NEW YORK - Hours after completing the New York City Marathon, Katie Holmes slipped on a pair of high heels to join husband Tom Cruise at a screening of his new movie, "Lions for Lambs."

The 28-year-old actress — who finished Sunday's race in 5 hours, 29 minutes and 58 seconds — accompanied Cruise to the Museum of Modern Art in Manhattan that evening, telling the TV show "Access Hollywood" that she was glad she stayed the 26.2-mile course.

"It was great," she said. "I'm a little tired, but it was worth it."

Cruise chimed in, saying: "She was impressive. She trained just a little over two months. ... It's impressive, so much fun today."

Cruise, 45, and their 1-year-old daughter, Suri, were at the finish line to greet Holmes, who had registered for the event under an alias.

"Lions for Lambs," an MGM release, opens Friday.