diff --git a/app/services/quick_actions/interpret_service.rb b/app/services/quick_actions/interpret_service.rb
index defa579f9a8..751aae2696d 100644
--- a/app/services/quick_actions/interpret_service.rb
+++ b/app/services/quick_actions/interpret_service.rb
@@ -643,7 +643,7 @@ module QuickActions
 
       if users.empty?
         users =
-          if params == 'me'
+          if params.strip == 'me'
             [current_user]
           else
             User.where(username: params.split(' ').map(&:strip))
diff --git a/changelogs/unreleased/52772-assign-me-quick-action-doesn-t-work-if-there-is-extra-white-space.yml b/changelogs/unreleased/52772-assign-me-quick-action-doesn-t-work-if-there-is-extra-white-space.yml
new file mode 100644
index 00000000000..4451cdd78b5
--- /dev/null
+++ b/changelogs/unreleased/52772-assign-me-quick-action-doesn-t-work-if-there-is-extra-white-space.yml
@@ -0,0 +1,5 @@
+---
+title: Resolve assign-me quick action doesn't work if there is extra white space
+merge_request: 22402
+author:
+type: fixed
diff --git a/doc/user/project/quick_actions.md b/doc/user/project/quick_actions.md
index c2f53540089..0a4542b71ed 100644
--- a/doc/user/project/quick_actions.md
+++ b/doc/user/project/quick_actions.md
@@ -24,6 +24,7 @@ discussions, and descriptions:
 | `/reopen`                  | Reopen                         | ✓     | ✓             |
 | `/title <New title>`       | Change title                   | ✓     |  ✓            |
 | `/award :emoji:`           | Toggle emoji award             | ✓     | ✓             |
+| `/assign me`               | Assign yourself                | ✓     | ✓             |
 | `/assign @user`            | Assign one user                | ✓     | ✓             |
 | `/assign @user1 @user2`    | Assign multiple users **[STARTER]** | ✓ |              |
 | `/unassign`                | Remove assignee(s)             | ✓     | ✓             |
diff --git a/spec/services/quick_actions/interpret_service_spec.rb b/spec/services/quick_actions/interpret_service_spec.rb
index ac0ca1f33a5..41a170e4f25 100644
--- a/spec/services/quick_actions/interpret_service_spec.rb
+++ b/spec/services/quick_actions/interpret_service_spec.rb
@@ -380,6 +380,14 @@ describe QuickActions::InterpretService do
       end
     end
 
+    shared_examples 'assign command' do
+      it 'assigns to a single user' do
+        _, updates = service.execute(content, issuable)
+
+        expect(updates).to eq(assignee_ids: [developer.id])
+      end
+    end
+
     it_behaves_like 'reopen command' do
       let(:content) { '/reopen' }
       let(:issuable) { issue }
@@ -474,67 +482,56 @@ describe QuickActions::InterpretService do
       let(:issuable) { issue }
     end
 
-    context 'assign command' do
-      let(:content) { "/assign @#{developer.username}" }
-
-      context 'Issue' do
-        it 'fetches assignee and populates assignee_ids if content contains /assign' do
-          _, updates = service.execute(content, issue)
-
-          expect(updates[:assignee_ids]).to match_array([developer.id])
-        end
+    context 'assign command with one user' do
+      it_behaves_like 'assign command' do
+        let(:content) { "/assign @#{developer.username}" }
+        let(:issuable) { issue }
       end
 
-      context 'Merge Request' do
-        it 'fetches assignee and populates assignee_ids if content contains /assign' do
-          _, updates = service.execute(content, merge_request)
-
-          expect(updates).to eq(assignee_ids: [developer.id])
-        end
+      it_behaves_like 'assign command' do
+        let(:content) { "/assign @#{developer.username}" }
+        let(:issuable) { merge_request }
       end
     end
 
+    # CE does not have multiple assignees
     context 'assign command with multiple assignees' do
-      let(:content) { "/assign @#{developer.username} @#{developer2.username}" }
-
       before do
         project.add_developer(developer2)
       end
 
-      context 'Issue' do
-        it 'fetches assignee and populates assignee_ids if content contains /assign' do
-          _, updates = service.execute(content, issue)
-
-          expect(updates[:assignee_ids]).to match_array([developer.id])
-        end
+      it_behaves_like 'assign command' do
+        let(:content) { "/assign @#{developer.username} @#{developer2.username}" }
+        let(:issuable) { issue }
       end
 
-      context 'Merge Request' do
-        it 'fetches assignee and populates assignee_ids if content contains /assign' do
-          _, updates = service.execute(content, merge_request)
-
-          expect(updates).to eq(assignee_ids: [developer.id])
-        end
+      it_behaves_like 'assign command' do
+        let(:content) { "/assign @#{developer.username} @#{developer2.username}" }
+        let(:issuable) { merge_request }
       end
     end
 
     context 'assign command with me alias' do
-      let(:content) { "/assign me" }
-
-      context 'Issue' do
-        it 'fetches assignee and populates assignee_ids if content contains /assign' do
-          _, updates = service.execute(content, issue)
-
-          expect(updates).to eq(assignee_ids: [developer.id])
-        end
+      it_behaves_like 'assign command' do
+        let(:content) { '/assign me' }
+        let(:issuable) { issue }
       end
 
-      context 'Merge Request' do
-        it 'fetches assignee and populates assignee_ids if content contains /assign' do
-          _, updates = service.execute(content, merge_request)
+      it_behaves_like 'assign command' do
+        let(:content) { '/assign me' }
+        let(:issuable) { merge_request }
+      end
+    end
 
-          expect(updates).to eq(assignee_ids: [developer.id])
-        end
+    context 'assign command with me alias and whitespace' do
+      it_behaves_like 'assign command' do
+        let(:content) { '/assign  me ' }
+        let(:issuable) { issue }
+      end
+
+      it_behaves_like 'assign command' do
+        let(:content) { '/assign  me ' }
+        let(:issuable) { merge_request }
       end
     end