Matt Damon crashes Kimmel, brings mom & sister

Matt Damon recently interrupted Jimmy Kimmel's Brooklyn residency on 'Jimmy Kimmel Live!' with an unannounced appearance. Damon, a self-proclaimed Red Sox superfan, began yelling cheers for his team, prompting a mix of applause and boos from the audience.

Kimmel playfully confronted Damon, who then revealed he was not alone. Damon brought Kimmel's mother, Joan, and sister, Jill, onto the stage, much to the host's feigned disbelief and anger. Security was called to escort Damon out, but he left with Kimmel's relatives.

Damon's exit line, "You can keep me off the show. But you can't keep me out of your mom," underscored the playful nature of their ongoing feud. This incident is the latest in a two-decade-long comedic rivalry that began in 2005.

The feud has featured various pranks, including Damon arriving in a Trojan horse three months prior to promote a film. Despite Kimmel's mock annoyance, their exchanges often involve humorous insults and physical comedy, like their pool noodle battle.