"Jimmy Kimmel Live!" to promote his upcoming film, "The Great Wall," and he did it in an unexpected way: claiming he is the father of the late-night show host's unborn child.

Damon and "Maury," and even Kimmel's pregnant wife, Molly. There was also plenty of entertaining trash talk along the way. Damon taunted Kimmel for being an "Emmy loser" and claimed he's lacking, er, important baby-making equipment.

The video tells us nothing about Damon's work on "The Great Wall," but it does serve as a great reminder of just how darn likable the actor is. He and Kimmel play off each other well, and Molly is a good sport for taking part in their antics.

"The Great Wall" hits theaters Feb. 17, and "Jimmy Kimmel Live!" airs weeknights at 11:35 p.m. ET/PT on ABC.