Bradley Cooper and Louis C.K. probably get along famously when no one is looking.

Most people saw the scene in "American Hustle" where Bradley Cooper beats up his comedian co-star, which must've been very difficult for Louis C.K. to go through.

Recently, Bradley Cooper unintentionally slammed his "American Hustle" co-star by asking a question to Sean Penn many many years ago.

According to HollywoodLife, Louis C.K. appeared on "The Steve Show" with Stephen Merchant and voiced his opinion on "Inside the Actors Studio."

The "Oh My God" comedian spoke about the film students who ask the actors questions towards the end of the show, saying, "You never will be famous. There's no way you ask Sean Penn a question and then, you're gonna be huge!"

A new viral video has been grazing the intewebz with a young Bradley Cooper as a second-year acting student asking none other than Sean Penn a question.

He was also reportedly able to ask Robert de Niro a question in another episode.

The "Silver Linings Playbook" star proved the hilarious comedian wrong twice.

Hopefully the comedian doesn't take it too hard. Maybe he'll even come up with a bit to get back at the actor.

As "Louie" fans rejoice for season 4 set to premiere on May 5 on FX, they'll have a chance to enjoy the successful comedian's presence before that.

Louis C.K. will be returning as a host for "Saturday Night Live" when it returns from hiatus on March 29, according to The Huffington Post.

He'll be appearing with musical guest Sam Smith.

The first time Louis hosted "Saturday Night Live" was back in 2012, just a week after Hurricane Sandy had hit parts of the East coast.

The last time he hosted "Saturday Night Live," Louis was in a sketch in which he made out with Kate McKinnon.

We can't wait to see what the "American Hustle" co-star will do this time.