diff --git a/src/NzbDrone.Core.Test/ParserTests/ParseUtilFixture.cs b/src/NzbDrone.Core.Test/ParserTests/ParseUtilFixture.cs
index badfe7c92..85ea8bf52 100644
--- a/src/NzbDrone.Core.Test/ParserTests/ParseUtilFixture.cs
+++ b/src/NzbDrone.Core.Test/ParserTests/ParseUtilFixture.cs
@@ -63,5 +63,22 @@ namespace NzbDrone.Core.Test.ParserTests
         {
             ParseUtil.GetLongFromString(original).Should().Be(parsedInt);
         }
+
+        [TestCase("tt0183790", "tt0183790")]
+        [TestCase("0183790", "tt0183790")]
+        [TestCase("183790", "tt0183790")]
+        [TestCase("tt10001870", "tt10001870")]
+        [TestCase("10001870", "tt10001870")]
+        [TestCase("tt", null)]
+        [TestCase("tt0", null)]
+        [TestCase("abc", null)]
+        [TestCase("abc0", null)]
+        [TestCase("0", null)]
+        [TestCase("", null)]
+        [TestCase(null, null)]
+        public void should_parse_full_imdb_id_from_string(string input, string expected)
+        {
+            ParseUtil.GetFullImdbId(input).Should().Be(expected);
+        }
     }
 }
diff --git a/src/NzbDrone.Core/IndexerSearch/ReleaseSearchService.cs b/src/NzbDrone.Core/IndexerSearch/ReleaseSearchService.cs
index 49fce0ba3..a98a981f3 100644
--- a/src/NzbDrone.Core/IndexerSearch/ReleaseSearchService.cs
+++ b/src/NzbDrone.Core/IndexerSearch/ReleaseSearchService.cs
@@ -57,7 +57,7 @@ namespace NzbDrone.Core.IndexerSearch
         {
             var searchSpec = Get<MovieSearchCriteria>(request, indexerIds, interactiveSearch);
 
-            var imdbId = ParseUtil.GetImdbID(request.imdbid);
+            var imdbId = ParseUtil.GetImdbId(request.imdbid);
 
             searchSpec.ImdbId = imdbId?.ToString("D7");
             searchSpec.TmdbId = request.tmdbid;
@@ -87,7 +87,7 @@ namespace NzbDrone.Core.IndexerSearch
         {
             var searchSpec = Get<TvSearchCriteria>(request, indexerIds, interactiveSearch);
 
-            var imdbId = ParseUtil.GetImdbID(request.imdbid);
+            var imdbId = ParseUtil.GetImdbId(request.imdbid);
 
             searchSpec.ImdbId = imdbId?.ToString("D7");
             searchSpec.Season = request.season;
diff --git a/src/NzbDrone.Core/Indexers/Definitions/Anthelion.cs b/src/NzbDrone.Core/Indexers/Definitions/Anthelion.cs
index f49041e6b..429c24cd2 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/Anthelion.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/Anthelion.cs
@@ -246,7 +246,7 @@ namespace NzbDrone.Core.Indexers.Definitions
 
                 // TODO: TMDb is also available
                 var qImdb = row.QuerySelector("a[href^=\"https://www.imdb.com\"]");
-                var imdb = qImdb != null ? ParseUtil.GetImdbID(qImdb.GetAttribute("href").Split('/').Last()) : null;
+                var imdb = qImdb != null ? ParseUtil.GetImdbId(qImdb.GetAttribute("href").Split('/').Last()) : null;
 
                 var release = new TorrentInfo
                 {
diff --git a/src/NzbDrone.Core/Indexers/Definitions/Avistaz/AvistazParserBase.cs b/src/NzbDrone.Core/Indexers/Definitions/Avistaz/AvistazParserBase.cs
index 64ccdc959..68b2d745c 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/Avistaz/AvistazParserBase.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/Avistaz/AvistazParserBase.cs
@@ -75,7 +75,7 @@ namespace NzbDrone.Core.Indexers.Definitions.Avistaz
 
                 if (row.MovieTvinfo != null)
                 {
-                    release.ImdbId = ParseUtil.GetImdbID(row.MovieTvinfo.Imdb).GetValueOrDefault();
+                    release.ImdbId = ParseUtil.GetImdbId(row.MovieTvinfo.Imdb).GetValueOrDefault();
                     release.TmdbId = row.MovieTvinfo.Tmdb.IsNullOrWhiteSpace() ? 0 : ParseUtil.TryCoerceInt(row.MovieTvinfo.Tmdb, out var tmdbResult) ? tmdbResult : 0;
                     release.TvdbId = row.MovieTvinfo.Tvdb.IsNullOrWhiteSpace() ? 0 : ParseUtil.TryCoerceInt(row.MovieTvinfo.Tvdb, out var tvdbResult) ? tvdbResult : 0;
                 }
diff --git a/src/NzbDrone.Core/Indexers/Definitions/BeyondHD.cs b/src/NzbDrone.Core/Indexers/Definitions/BeyondHD.cs
index d25a358b5..b1e46428d 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/BeyondHD.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/BeyondHD.cs
@@ -209,7 +209,7 @@ namespace NzbDrone.Core.Indexers.Definitions
 
                 // BHD can return crazy values for tmdb
                 var tmdbId = row.TmdbId.IsNullOrWhiteSpace() ? 0 : ParseUtil.TryCoerceInt(row.TmdbId.Split("/")[1], out var tmdbResult) ? tmdbResult : 0;
-                var imdbId = ParseUtil.GetImdbID(row.ImdbId).GetValueOrDefault();
+                var imdbId = ParseUtil.GetImdbId(row.ImdbId).GetValueOrDefault();
 
                 var release = new TorrentInfo
                 {
diff --git a/src/NzbDrone.Core/Indexers/Definitions/GreatPosterWall.cs b/src/NzbDrone.Core/Indexers/Definitions/GreatPosterWall.cs
index a6207d455..ace0e0829 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/GreatPosterWall.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/GreatPosterWall.cs
@@ -192,7 +192,7 @@ public class GreatPosterWallParser : GazelleParser
                     MinimumSeedTime = 172800 // 48 hours
                 };
 
-                var imdbId = ParseUtil.GetImdbID(result.ImdbId);
+                var imdbId = ParseUtil.GetImdbId(result.ImdbId);
                 if (imdbId != null)
                 {
                     release.ImdbId = (int)imdbId;
diff --git a/src/NzbDrone.Core/Indexers/Definitions/HDBits/HDBitsRequestGenerator.cs b/src/NzbDrone.Core/Indexers/Definitions/HDBits/HDBitsRequestGenerator.cs
index b31861381..0122a296e 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/HDBits/HDBitsRequestGenerator.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/HDBits/HDBitsRequestGenerator.cs
@@ -20,7 +20,7 @@ namespace NzbDrone.Core.Indexers.Definitions.HDBits
         {
             var pageableRequests = new IndexerPageableRequestChain();
             var query = new TorrentQuery();
-            var imdbId = ParseUtil.GetImdbID(searchCriteria.ImdbId).GetValueOrDefault(0);
+            var imdbId = ParseUtil.GetImdbId(searchCriteria.ImdbId).GetValueOrDefault(0);
 
             if (searchCriteria.Categories?.Length > 0)
             {
@@ -78,7 +78,7 @@ namespace NzbDrone.Core.Indexers.Definitions.HDBits
             var pageableRequests = new IndexerPageableRequestChain();
             var query = new TorrentQuery();
             var tvdbId = searchCriteria.TvdbId.GetValueOrDefault(0);
-            var imdbId = ParseUtil.GetImdbID(searchCriteria.ImdbId).GetValueOrDefault(0);
+            var imdbId = ParseUtil.GetImdbId(searchCriteria.ImdbId).GetValueOrDefault(0);
 
             if (searchCriteria.Categories?.Length > 0)
             {
diff --git a/src/NzbDrone.Core/Indexers/Definitions/HDSpace.cs b/src/NzbDrone.Core/Indexers/Definitions/HDSpace.cs
index 0bac28dfd..6d43ff37a 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/HDSpace.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/HDSpace.cs
@@ -282,7 +282,7 @@ namespace NzbDrone.Core.Indexers.Definitions
                 var imdbLink = row.QuerySelector("td:nth-child(2) a[href*=imdb]");
                 if (imdbLink != null)
                 {
-                    release.ImdbId = ParseUtil.GetImdbID(imdbLink.GetAttribute("href").Split('/').Last()).GetValueOrDefault();
+                    release.ImdbId = ParseUtil.GetImdbId(imdbLink.GetAttribute("href").Split('/').Last()).GetValueOrDefault();
                 }
 
                 //"July 11, 2015, 13:34:09", "Today|Yesterday at 20:04:23"
diff --git a/src/NzbDrone.Core/Indexers/Definitions/HDTorrents.cs b/src/NzbDrone.Core/Indexers/Definitions/HDTorrents.cs
index 958a03d74..ba3f1859d 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/HDTorrents.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/HDTorrents.cs
@@ -328,7 +328,7 @@ namespace NzbDrone.Core.Indexers.Definitions
                 }
 
                 var imdbLink = row.QuerySelector("a[href*=\"www.imdb.com/title/\"]")?.GetAttribute("href");
-                var imdb = !string.IsNullOrWhiteSpace(imdbLink) ? ParseUtil.GetImdbID(imdbLink) : null;
+                var imdb = !string.IsNullOrWhiteSpace(imdbLink) ? ParseUtil.GetImdbId(imdbLink) : null;
 
                 var flags = new HashSet<IndexerFlag>();
 
diff --git a/src/NzbDrone.Core/Indexers/Definitions/NorBits.cs b/src/NzbDrone.Core/Indexers/Definitions/NorBits.cs
index 877f0459c..470e819ec 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/NorBits.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/NorBits.cs
@@ -313,7 +313,7 @@ public class NorBitsParser : IParseIndexerResponse
             }
 
             var imdbLink = row.QuerySelector("a[href*=\"imdb.com/title/tt\"]")?.GetAttribute("href");
-            release.ImdbId = ParseUtil.GetImdbID(imdbLink) ?? 0;
+            release.ImdbId = ParseUtil.GetImdbId(imdbLink) ?? 0;
 
             if (row.QuerySelector("img[title=\"100% freeleech\"]") != null)
             {
diff --git a/src/NzbDrone.Core/Indexers/Definitions/PixelHD.cs b/src/NzbDrone.Core/Indexers/Definitions/PixelHD.cs
index b5062cb96..83173fc1b 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/PixelHD.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/PixelHD.cs
@@ -180,7 +180,7 @@ public class PixelHDParser : IParseIndexerResponse
             var groupName = group.QuerySelector("strong:has(a[title=\"View Torrent\"])")?.TextContent.Replace(" ]", "]");
 
             var imdbLink = group.QuerySelector("a[href*=\"imdb.com/title/tt\"]")?.GetAttribute("href");
-            var imdbId = ParseUtil.GetImdbID(imdbLink) ?? 0;
+            var imdbId = ParseUtil.GetImdbId(imdbLink) ?? 0;
 
             var rows = group.QuerySelectorAll("tr.group_torrent:has(a[href^=\"torrents.php?id=\"])");
             foreach (var row in rows)
diff --git a/src/NzbDrone.Core/Indexers/Definitions/RevolutionTT.cs b/src/NzbDrone.Core/Indexers/Definitions/RevolutionTT.cs
index 08b0ba572..b966a599f 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/RevolutionTT.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/RevolutionTT.cs
@@ -286,7 +286,7 @@ namespace NzbDrone.Core.Indexers.Definitions
                 var category = row.QuerySelector(".br_type > a").GetAttribute("href").Replace("browse.php?cat=", string.Empty);
 
                 var qImdb = row.QuerySelector("a[href*=\"www.imdb.com/\"]");
-                var imdb = qImdb != null ? ParseUtil.GetImdbID(qImdb.GetAttribute("href").Split('/').Last()) : null;
+                var imdb = qImdb != null ? ParseUtil.GetImdbId(qImdb.GetAttribute("href").Split('/').Last()) : null;
 
                 var release = new TorrentInfo
                 {
diff --git a/src/NzbDrone.Core/Indexers/Definitions/SceneHD.cs b/src/NzbDrone.Core/Indexers/Definitions/SceneHD.cs
index 651cd280d..c83d8a3ae 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/SceneHD.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/SceneHD.cs
@@ -213,7 +213,7 @@ namespace NzbDrone.Core.Indexers.Definitions
                     Files = item.Value<int>("numfiles"),
                     Seeders = item.Value<int>("seeders"),
                     Peers = item.Value<int>("leechers") + item.Value<int>("seeders"),
-                    ImdbId = ParseUtil.GetImdbID(item.Value<string>("imdbid")) ?? 0,
+                    ImdbId = ParseUtil.GetImdbId(item.Value<string>("imdbid")) ?? 0,
                     MinimumRatio = 1,
                     MinimumSeedTime = 0,
                     DownloadVolumeFactor = dlVolumeFactor,
diff --git a/src/NzbDrone.Core/Indexers/Definitions/SpeedApp/SpeedAppBase.cs b/src/NzbDrone.Core/Indexers/Definitions/SpeedApp/SpeedAppBase.cs
index 942e275a0..abbab8399 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/SpeedApp/SpeedAppBase.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/SpeedApp/SpeedAppBase.cs
@@ -262,7 +262,7 @@ namespace NzbDrone.Core.Indexers.Definitions
                 Title = CleanTitle(torrent.Name),
                 Description = torrent.ShortDescription,
                 Size = torrent.Size,
-                ImdbId = ParseUtil.GetImdbID(torrent.ImdbId).GetValueOrDefault(),
+                ImdbId = ParseUtil.GetImdbId(torrent.ImdbId).GetValueOrDefault(),
                 DownloadUrl = $"{_settings.BaseUrl}api/torrent/{torrent.Id}/download",
                 PosterUrl = torrent.Poster,
                 InfoUrl = torrent.Url,
diff --git a/src/NzbDrone.Core/Indexers/Definitions/TorrentDay.cs b/src/NzbDrone.Core/Indexers/Definitions/TorrentDay.cs
index 0d48be5fa..81d900f74 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/TorrentDay.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/TorrentDay.cs
@@ -244,7 +244,7 @@ namespace NzbDrone.Core.Indexers.Definitions
                 var downloadMultiplier = (double?)row["download-multiplier"] ?? 1;
                 var link = new Uri(_settings.BaseUrl + "download.php/" + torrentId + "/" + torrentId + ".torrent");
                 var publishDate = DateTimeUtil.UnixTimestampToDateTime((long)row.ctime).ToLocalTime();
-                var imdb = ParseUtil.GetImdbID(imdbId) ?? 0;
+                var imdb = ParseUtil.GetImdbId(imdbId) ?? 0;
 
                 var release = new TorrentInfo
                 {
diff --git a/src/NzbDrone.Core/Indexers/Definitions/UNIT3D/Unit3dParser.cs b/src/NzbDrone.Core/Indexers/Definitions/UNIT3D/Unit3dParser.cs
index 46d305e92..572bec8d7 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/UNIT3D/Unit3dParser.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/UNIT3D/Unit3dParser.cs
@@ -60,7 +60,7 @@ namespace NzbDrone.Core.Indexers.Definitions.UNIT3D
                     Files = row.Attributes.Files,
                     Grabs = row.Attributes.Grabs,
                     Seeders = row.Attributes.Seeders,
-                    ImdbId = ParseUtil.GetImdbID(row.Attributes.ImdbId).GetValueOrDefault(),
+                    ImdbId = ParseUtil.GetImdbId(row.Attributes.ImdbId).GetValueOrDefault(),
                     TmdbId = row.Attributes.TmdbId.IsNullOrWhiteSpace() ? 0 : ParseUtil.CoerceInt(row.Attributes.TmdbId),
                     TvdbId = row.Attributes.TvdbId.IsNullOrWhiteSpace() ? 0 : ParseUtil.CoerceInt(row.Attributes.TvdbId),
                     Peers = row.Attributes.Leechers + row.Attributes.Seeders,
diff --git a/src/NzbDrone.Core/Parser/ParseUtil.cs b/src/NzbDrone.Core/Parser/ParseUtil.cs
index 0b21a8575..ea80afb20 100644
--- a/src/NzbDrone.Core/Parser/ParseUtil.cs
+++ b/src/NzbDrone.Core/Parser/ParseUtil.cs
@@ -8,7 +8,7 @@ namespace NzbDrone.Core.Parser
 {
     public static class ParseUtil
     {
-        private static readonly Regex ImdbId = new Regex(@"^(?:tt)?(\d{1,8})$", RegexOptions.Compiled);
+        private static readonly Regex ImdbIdRegex = new (@"^(?:tt)?(\d{1,8})$", RegexOptions.Compiled);
 
         public static string NormalizeMultiSpaces(string s) =>
             new Regex(@"\s+").Replace(s.Trim(), " ");
@@ -85,14 +85,15 @@ namespace NzbDrone.Core.Parser
             return CoerceLong(extractedLong);
         }
 
-        public static int? GetImdbID(string imdbstr)
+        public static int? GetImdbId(string value)
         {
-            if (imdbstr == null)
+            if (value == null)
             {
                 return null;
             }
 
-            var match = ImdbId.Match(imdbstr);
+            var match = ImdbIdRegex.Match(value);
+
             if (!match.Success)
             {
                 return null;
@@ -101,17 +102,16 @@ namespace NzbDrone.Core.Parser
             return int.Parse(match.Groups[1].Value, NumberStyles.Any, CultureInfo.InvariantCulture);
         }
 
-        public static string GetFullImdbId(string imdbstr)
+        public static string GetFullImdbId(string value)
         {
-            var imdbid = GetImdbID(imdbstr);
-            if (imdbid == null)
+            var imdbId = GetImdbId(value);
+
+            if (imdbId is null or 0)
             {
                 return null;
             }
 
-            var imdbLen = ((int)imdbid > 9999999) ? "D8" : "D7";
-
-            return "tt" + ((int)imdbid).ToString(imdbLen);
+            return $"tt{imdbId.GetValueOrDefault():D7}";
         }
 
         public static string GetArgumentFromQueryString(string url, string argument)