Matt Damon crashes 'Jimmy Kimmel Live' to fuel their never-ending feud

Debbie and Elizabeth. Paris and Nicole. Matt and Jimmy: all classic Hollywood feuds that keep fans guessing and gossip swirling.

Matt Damon and Jimmy Kimmel's mutual hatred burned on after Jimmy unmasked his surprise guest, Super Bowl MVP Tom Brady, on his show Monday night, only to find out that his enemy, Matt, was the real fraud behind the helmet.

Matt Damon, once again, snuck his way onto the show after Jimmy has made it clear time and time again that he has no interest in interviewing the movie star.

Not even disguising himself as his favorite New England bro could earn Matt a spot on the couch.