The ongoing mock feud between actor Matt Damon and late night TV host Jimmy Kimmel found a new battleground Tuesday night as the actor crashed the "Jimmy Kimmel Live!" appearance of "Thor: Ragnarok" actors Chris Hemsworth and Mark Ruffalo plus director Taika Waititi.

While being interviewed by Kimmel, Hemsworth revealed that he had brought his co-star and his director and that they were hanging out backstage. Kimmel then had the camera cut to the backstage green room to have a little chat with the two. As he was talking with Ruffalo, the familiar face of Damon sneaked into the shot.

The camera tried different angles in order to remove Damon from the shots, but the persistent actor kept sneaking into them, leading Kimmel to yell at Damon, "It's the mighty Thor, not the mighty bore!"

While the host attempted to continue discussing the film with the actor and the director, Damon kept appearing in the background, declaring to Kimmel, "I'm on the show!" He then took a jab at the late night show host, "This is what movie actors look like right here. We didn't ride Adam Carolla's coattails."

The host was forced to cut back to Hemsworth, who was sitting with him on the stage. The Australian actor immediately clarified that he did not invite Damon. "I mean I'm friends with him, but I feel sorry for him," Hemsworth said. "He has nothing. I saw a friend in need and decided to extend the handshake."

As they were chatting, Damon's face suddenly appeared in front of the familiar background behind the stage. "I hacked into the system!" Damon said. "I've been here a really long time, Jimmy, decades. I've learned a lot of stuff."

Damon then opened his mouth and gestured as if he was taking a bite out of Kimmel. This confrontation is the latest in the mock feud between the actor and the host, which has lasted more than a decade.