diff --git a/HISTORY.rst b/HISTORY.rst
index cbd2845..e317844 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -86,6 +86,7 @@ History
 - Added `12-bit` as new `color_depth` possible value.
 - Added `IMAX` as new `edition` possible value.
 - Added `Upscaled` as new `other` possible value.
+- Added `Ultimate` as new `edition` possible value.
 
 2.1.4 (2017-06-01)
 ------------------
diff --git a/docs/properties.rst b/docs/properties.rst
index 06971ae..87ce77f 100644
--- a/docs/properties.rst
+++ b/docs/properties.rst
@@ -266,8 +266,8 @@ Other properties
   Edition of the movie.
 
   - ``Alternative Cut``, ``Collector``, ``Criterion``, ``Deluxe``, ``Director's Cut``, ``Director's Definitive Cut``,
-    ``Extended``, ``Festival``, ``IMAX``, ``Remastered``, ``Special``, ``Limited``, ``Theatrical``, ``Uncensored``,
-    ``Uncut``, ``Unrated``
+    ``Extended``, ``Festival``, ``IMAX``, ``Remastered``, ``Special``, ``Limited``, ``Theatrical``, ``Ultimate``,
+    ``Uncensored``, ``Uncut``, ``Unrated``
 
 
 - **film**
diff --git a/guessit/rules/properties/edition.py b/guessit/rules/properties/edition.py
index 214d3fb..f3cd8ab 100644
--- a/guessit/rules/properties/edition.py
+++ b/guessit/rules/properties/edition.py
@@ -19,7 +19,7 @@ def edition():
     rebulk = Rebulk().regex_defaults(flags=re.IGNORECASE, abbreviations=[dash]).string_defaults(ignore_case=True)
     rebulk.defaults(name='edition', validator=seps_surround)
 
-    rebulk.regex('collector', 'collector-edition', 'edition-collector', value='Collector')
+    rebulk.regex('collector', "collector'?s?-edition", 'edition-collector', value='Collector')
     rebulk.regex('special-edition', 'edition-special', value='Special',
                  conflict_solver=lambda match, other: other
                  if other.name == 'episode_details' and other.value == 'Special'
@@ -39,5 +39,7 @@ def edition():
         rebulk.string(value, value=value, tags=['has-neighbor', 'release-group-prefix'])
     rebulk.string('Festival', value='Festival', tags=['has-neighbor-before', 'has-neighbor-after'])
     rebulk.regex('imax', 'imax-edition', value='IMAX')
+    rebulk.regex('ultimate-edition', value='Ultimate')
+    rebulk.regex("ultimate-collector'?s?-edition", value=['Ultimate', 'Collector'])
 
     return rebulk
diff --git a/guessit/test/movies.yml b/guessit/test/movies.yml
index fe782bc..5327952 100644
--- a/guessit/test/movies.yml
+++ b/guessit/test/movies.yml
@@ -1323,3 +1323,22 @@
   audio_channels: '5.1'
   type: movie
 
+? Casablanca [Ultimate Collector's Edition].1942.BRRip.XviD-VLiS
+: title: Casablanca
+  edition: [Ultimate, Collector]
+  year: 1942
+  source: Blu-ray
+  other: [Reencoded, Rip]
+  video_codec: Xvid
+  release_group: VLiS
+  type: movie
+
+? Batman V Superman Dawn of Justice 2016 Extended Cut Ultimate Edition HDRip x264 AC3-DaDDy
+: title: Batman V Superman Dawn of Justice
+  year: 2016
+  edition: [Extended, Ultimate]
+  other: [HD, Rip]
+  video_codec: H.264
+  audio_codec: Dolby Digital
+  release_group: DaDDy
+  type: movie
diff --git a/guessit/test/rules/edition.yml b/guessit/test/rules/edition.yml
index c5e6c27..3ca942b 100644
--- a/guessit/test/rules/edition.yml
+++ b/guessit/test/rules/edition.yml
@@ -36,4 +36,18 @@
 
 ? IMAX
 ? IMAX Edition
-: edition: IMAX
\ No newline at end of file
+: edition: IMAX
+
+? ULTIMATE EDITION
+? -ULTIMATE
+: edition: Ultimate
+
+? ULTIMATE COLLECTOR EDITION
+? ULTIMATE COLLECTOR'S EDITION
+? ULTIMATE COLLECTORS EDITION
+? -COLLECTORS EDITION
+? -ULTIMATE EDITION
+: edition: [Ultimate, Collector]
+
+? ULTIMATE COLLECTORS EDITION DC
+: edition: [Ultimate, Collector, Director's Cut]