diff --git a/models/fixtures/action_run.yml b/models/fixtures/action_run.yml
index b7d1201189f..1df02e48090 100644
--- a/models/fixtures/action_run.yml
+++ b/models/fixtures/action_run.yml
@@ -89,7 +89,7 @@
   ref: "refs/heads/test"
   commit_sha: "c2d72f548424103f01ee1dc02889c1e2bff816b0"
   event: "push"
-  trigger_event: "push"
+  trigger_event: "schedule"
   is_fork_pull_request: 0
   status: 1
   started: 1683636528
diff --git a/services/convert/action_test.go b/services/convert/action_test.go
index 7080fc2f146..a0a16cb0faa 100644
--- a/services/convert/action_test.go
+++ b/services/convert/action_test.go
@@ -8,8 +8,10 @@ import (
 	"strings"
 	"testing"
 
+	actions_model "code.gitea.io/gitea/models/actions"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unit"
+	"code.gitea.io/gitea/models/unittest"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/git/gitcmd"
 	"code.gitea.io/gitea/modules/util"
@@ -107,3 +109,18 @@ func TestGetActionWorkflow_FallbackRef(t *testing.T) {
 		assert.ErrorIs(t, err, util.ErrNotExist)
 	})
 }
+
+func TestToActionWorkflowRun_UsesTriggerEvent(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 2})
+	run := unittest.AssertExistsAndLoadBean(t, &actions_model.ActionRun{ID: 803})
+
+	// Scheduled runs keep Event as the registration event (push) and use TriggerEvent as the real trigger.
+	run.Event = "push"
+	run.TriggerEvent = "schedule"
+
+	apiRun, err := ToActionWorkflowRun(t.Context(), repo, run)
+	require.NoError(t, err)
+	assert.Equal(t, "schedule", apiRun.Event)
+}
diff --git a/services/convert/convert.go b/services/convert/convert.go
index f7a207622be..269defe6a11 100644
--- a/services/convert/convert.go
+++ b/services/convert/convert.go
@@ -260,7 +260,7 @@ func ToActionWorkflowRun(ctx context.Context, repo *repo_model.Repository, run *
 		RunNumber:    run.Index,
 		StartedAt:    run.Started.AsLocalTime(),
 		CompletedAt:  run.Stopped.AsLocalTime(),
-		Event:        string(run.Event),
+		Event:        run.TriggerEvent,
 		DisplayTitle: run.Title,
 		HeadBranch:   git.RefName(run.Ref).BranchName(),
 		HeadSha:      run.CommitSHA,
diff --git a/tests/integration/workflow_run_api_check_test.go b/tests/integration/workflow_run_api_check_test.go
index 6a80bb51186..8efcf18f8b0 100644
--- a/tests/integration/workflow_run_api_check_test.go
+++ b/tests/integration/workflow_run_api_check_test.go
@@ -44,6 +44,10 @@ func testAPIWorkflowRunBasic(t *testing.T, apiRootURL, userUsername string, runI
 	foundRun := false
 
 	for _, run := range runnerList.Entries {
+		if run.ID == 802 {
+			// Fixture stores registration event (push) and schedule as trigger; API must expose the trigger as Event.
+			assert.Equal(t, "schedule", run.Event)
+		}
 		// Verify filtering works
 		verifyWorkflowRunCanbeFoundWithStatusFilter(t, apiRunsURL, token, run.ID, "", run.Status, "", "", "", "")
 		verifyWorkflowRunCanbeFoundWithStatusFilter(t, apiRunsURL, token, run.ID, run.Conclusion, "", "", "", "", "")