diff --git a/app/services/quick_actions/interpret_service.rb b/app/services/quick_actions/interpret_service.rb
index 4abb936e14a..28fa887bf2d 100644
--- a/app/services/quick_actions/interpret_service.rb
+++ b/app/services/quick_actions/interpret_service.rb
@@ -268,18 +268,20 @@ module QuickActions
       end
     end
 
-    desc 'Inherit (copy) labels and milestone from other issue'
-    explanation do |issue_id|
-      "Inherit (copy) labels and milestone from issue \"#{issue_id}\"."
+    desc 'Copy labels and milestone from other issue or merge request'
+    explanation do |issueable_id|
+      "Copy labels and milestone from issue or merge_request \"#{issueable_id}\"."
     end
-    params '#issue'
+    params '< #issue | !merge_request >'
     condition do
       issuable.persisted? &&
         current_user.can?(:"update_#{issuable.to_ability_name}", issuable)
     end
-    command :inherit do |issue_id|
-      issue = extract_references(issue_id, :issue).first
-      if issue.present? && issue.project_id == issuable.project_id
+    command :copy_metadata do |issueable_id|
+      reference_type = issueable_id.include?("#") ? :issue : :merge_request
+      issue = extract_references(issueable_id, reference_type).first
+
+      if issue.present? && issue.project.id == issuable.project.id
         @updates[:add_label_ids] = issue.labels.map(&:id)
 
         @updates[:milestone_id] = issue.milestone.id if issue.milestone
diff --git a/changelogs/unreleased/add-inherit-command.yml b/changelogs/unreleased/add-inherit-command.yml
index 84f5bc97fbe..d47aa8c7b36 100644
--- a/changelogs/unreleased/add-inherit-command.yml
+++ b/changelogs/unreleased/add-inherit-command.yml
@@ -1,5 +1,5 @@
 ---
 title: Add Inherit quick action
-merge_request:
+merge_request: 16473
 author: Mateusz Bajorski
 type: added
diff --git a/doc/user/project/quick_actions.md b/doc/user/project/quick_actions.md
index 3b6bdc8ca3d..e2e2b859d35 100644
--- a/doc/user/project/quick_actions.md
+++ b/doc/user/project/quick_actions.md
@@ -41,4 +41,4 @@ do.
 | `/move path/to/project`	     | Moves issue to another project |
 | `/tableflip`	             | Append the comment with `(╯°□°)╯︵ ┻━┻` |
 | `/shrug`	                 | Append the comment with `¯\＿(ツ)＿/¯` |
-| `/inherit #issue`          | Inherit (copy) labels and milestone from other issue |
+| <code>/copy_metadata &lt; #issue &#124; !merge_request &gt;</code> | copy_metadata labels and milestone from other issue or merge request |
diff --git a/spec/services/quick_actions/interpret_service_spec.rb b/spec/services/quick_actions/interpret_service_spec.rb
index ebe0c7639a0..9a8240f9491 100644
--- a/spec/services/quick_actions/interpret_service_spec.rb
+++ b/spec/services/quick_actions/interpret_service_spec.rb
@@ -306,17 +306,17 @@ describe QuickActions::InterpretService do
       end
     end
 
-    shared_examples 'inherit command' do
-      it 'fetches issue and copies labels and milestone if content contains /inherit issue_reference' do
-        issue_father # populate the issue
+    shared_examples 'copy_metadata command' do
+      it 'fetches issue or merge request and copies labels and milestone if content contains /copy_metadata reference' do
+        issueable_father # populate the issue
         todo_label # populate this label
         inreview_label # populate this label
         _, updates = service.execute(content, issuable)
 
         expect(updates[:add_label_ids]).to match_array([inreview_label.id, todo_label.id])
 
-        if issue_father.milestone
-          expect(updates[:milestone_id]).to eq(issue_father.milestone.id)
+        if issueable_father.milestone
+          expect(updates[:milestone_id]).to eq(issueable_father.milestone.id)
         else
           expect(updates).not_to have_key(:milestone_id)
         end
@@ -774,49 +774,49 @@ describe QuickActions::InterpretService do
       let(:issuable) { issue }
     end
 
-    context '/inherit command' do
+    context '/copy_metadata command' do
       let!(:todo_label) { create(:label, project: project, title: 'To Do') }
       let!(:inreview_label) { create(:label, project: project, title: 'In Review') }
 
-      it_behaves_like 'inherit command' do
-        # Without milestone assignment
-        let(:issue_father) { create(:labeled_issue, project: project, labels: [inreview_label, todo_label]) }
-
-        let(:content) { "/inherit #{issue_father.to_reference}" }
-        let(:issuable) { issue }
-      end
-
-      it_behaves_like 'inherit command' do
-        # With milestone assignment
-        let(:issue_father) { create(:labeled_issue, project: project, labels: [todo_label, inreview_label], milestone: milestone) }
-
-        let(:content) { "/inherit #{issue_father.to_reference(project)}" }
-        let(:issuable) { issue }
-      end
-
       it_behaves_like 'empty command' do
-        let(:content) { '/inherit' }
+        let(:content) { '/copy_metadata' }
         let(:issuable) { issue }
       end
 
+      it_behaves_like 'copy_metadata command' do
+        let(:issueable_father) { create(:labeled_issue, project: project, labels: [inreview_label, todo_label]) }
+
+        let(:content) { "/copy_metadata #{issueable_father.to_reference}" }
+        let(:issuable) { issue }
+      end
+
+      context 'when the parent issueable has a milestone' do
+        it_behaves_like 'copy_metadata command' do
+          let(:issueable_father) { create(:labeled_issue, project: project, labels: [todo_label, inreview_label], milestone: milestone) }
+
+          let(:content) { "/copy_metadata #{issueable_father.to_reference(project)}" }
+          let(:issuable) { issue }
+        end
+      end
+
       context 'cross project references' do
         it_behaves_like 'empty command' do
           let(:other_project) { create(:project, :public) }
-          let(:issue_father) { create(:labeled_issue, project: other_project, labels: [todo_label, inreview_label]) }
-          let(:content) { "/inherit #{issue_father.to_reference(project)}" }
+          let(:issueable_father) { create(:labeled_issue, project: other_project, labels: [todo_label, inreview_label]) }
+          let(:content) { "/copy_metadata #{issueable_father.to_reference(project)}" }
           let(:issuable) { issue }
         end
 
         it_behaves_like 'empty command' do
-          let(:content) { "/inherit imaginary#1234" }
+          let(:content) { "/copy_metadata imaginary#1234" }
           let(:issuable) { issue }
         end
 
         it_behaves_like 'empty command' do
           let(:other_project) { create(:project, :private) }
-          let(:issue_father) { create(:issue, project: other_project) }
+          let(:issueable_father) { create(:issue, project: other_project) }
 
-          let(:content) { "/inherit #{issue_father.to_reference(project)}" }
+          let(:content) { "/copy_metadata #{issueable_father.to_reference(project)}" }
           let(:issuable) { issue }
         end
       end