diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b9df236f7..aa3b9adb8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,7 +1,7 @@
 name: test
 on:
-  pull_request:
-    branches: [ main, releases-1.0.x ]
+  push:
+    branches: [ main, releases-1.0.x, feat/run-add-comment ]
 jobs:
   codegen:
     name: Codegen
@@ -40,4 +40,4 @@ jobs:
       - name: verify go.mod and go.sum are consistent
         run : go mod tidy
       - name: Ensure nothing changed
-        run: git diff --exit-code
\ No newline at end of file
+        run: git diff --exit-code
diff --git a/mocks/run_mocks.go b/mocks/run_mocks.go
index 6d40fc1cf..5db134d27 100644
--- a/mocks/run_mocks.go
+++ b/mocks/run_mocks.go
@@ -35,6 +35,20 @@ func (m *MockRuns) EXPECT() *MockRunsMockRecorder {
 	return m.recorder
 }
 
+// AddComment mocks base method.
+func (m *MockRuns) AddComment(ctx context.Context, runID string, options tfe.RunCommentOptions) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "AddComment", ctx, runID, options)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// AddComment indicates an expected call of AddComment.
+func (mr *MockRunsMockRecorder) AddComment(ctx, runID, options interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddComment", reflect.TypeOf((*MockRuns)(nil).AddComment), ctx, runID, options)
+}
+
 // Apply mocks base method.
 func (m *MockRuns) Apply(ctx context.Context, runID string, options tfe.RunApplyOptions) error {
 	m.ctrl.T.Helper()
diff --git a/run.go b/run.go
index 9a069efd0..0283a3baa 100644
--- a/run.go
+++ b/run.go
@@ -38,6 +38,9 @@ type Runs interface {
 
 	// Discard a run by its ID.
 	Discard(ctx context.Context, runID string, options RunDiscardOptions) error
+
+	// AddComment to add a comment on a run.
+	AddComment(ctx context.Context, runID string, options RunCommentOptions) error
 }
 
 // runs implements Runs.
@@ -278,6 +281,13 @@ type RunDiscardOptions struct {
 	Comment *string `jsonapi:"attr,comment,omitempty"`
 }
 
+// RunCommentOptions represents the options for a run comment.
+type RunCommentOptions struct {
+	Type string  `jsonapi:"primary,comments"`
+	Body *string `jsonapi:"attr,body,omitempty"`
+	Run  *Run    `jsonapi:"relation,run"`
+}
+
 // List all the runs of the given workspace.
 func (s *runs) List(ctx context.Context, workspaceID string, options *RunListOptions) (*RunList, error) {
 	if !validStringID(&workspaceID) {
@@ -411,6 +421,21 @@ func (s *runs) Discard(ctx context.Context, runID string, options RunDiscardOpti
 	return s.client.do(ctx, req, nil)
 }
 
+// AddComment to add a comment on a run.
+func (s *runs) AddComment(ctx context.Context, runID string, options RunCommentOptions) error {
+	if !validStringID(&runID) {
+		return ErrInvalidRunID
+	}
+
+	u := fmt.Sprintf("runs/%s/comments", url.QueryEscape(runID))
+	req, err := s.client.newRequest("POST", u, &options)
+	if err != nil {
+		return err
+	}
+
+	return s.client.do(ctx, req, nil)
+}
+
 func (o RunCreateOptions) valid() error {
 	if o.Workspace == nil {
 		return ErrRequiredWorkspace