Ben Affleck teased that he was surprised his brother, Casey Affleck, didn't thank him in his Golden Globes speech.

Ben appeared on Jimmy Kimmel Live! Monday and spoke about Casey winning the Golden Globe for Best Actor in a Motion Picture - Drama for his acclaimed performance in Manchester by the Sea. Casey actually left out his brother Ben in his acceptance speech, which Ben is now commenting on.

"Someone was omitted ... I was a little taken aback," Ben quipped to host Jimmy Kimmel. "That's not the kind of thing I would do. If it's me, you know, I thank people."

In Casey's lengthy speech he thanked everyone from his castmates to one of the film's producers, Matt Damon, to his fellow nominee Denzel Washington.

"I needed that little push, but I did say 'My brother is brilliant.' Those words came out of my mouth," Ben said. "We didn't hear anything like that last night [at the Globes]. I mean [there was] the thing with Denzel [Washington], and the thing with Matt [Damon], he was Mr. Hollywood."

Casey is having a very impressive awards run for his leading role in Manchester by the Sea. The actor previously took home a Critics' Choice Award and has won a slew of other critics awards, including the New York Film Critics Circle, the National Society of Critics and the National Board of Review. He is currently nominated for a Screen Actors Guild Award and a BAFTA Award, two very important precursors for the Oscars.

While Ben has already won Oscars, for writing Good Will Hunting and producing Argo, he has never even been nominated for his acting. Casey received an Oscar nomination for his scene-stealing role in The Assassination of Jesse James by the Coward Robert Ford back in 2008.

The Oscar nominations will be revealed on Tuesday, Jan. 24.

Check out Casey's acceptance speech at the Golden Globes below:

Tags: Ben Affleck casey affleck Movies Manchester by the Sea golden globes