Julia made her first appearance back in 1989, when she sat down with her Steel Magnolias co-stars. Since then, she has shared the stage with Oprah 21 times. Viewers watched as she became a wife and a mother and took on lead roles in movies like Erin Brockovich and Eat Pray Love.
Watch Julia and Tom's memorable moments on the show
Tom's first appearance was back in 1988, when he talked to Oprah about his movie Punchline. In the years since, he's won back-to-back Oscars and taken on memorable roles in films like Philadelphia, Forrest Gump, Apollo 13 and Cast Away. This is the 13th time he has appeared on The Oprah Show.