The stars have often poked fun at their likeness and last month (Mar16), they announced they were embracing the fact they look like brothers by throwing a party to benefit their favourite charities.

The Red Hot Benefit Comedy + Music Show & Quinceanera will take place at the Shrine Auditorium in downtown Los Angeles on Friday night (29Apr16), and now it's been revealed Smith's Red Hot Chili Peppers pals and Devo will also hit the stage, while comics Jim Gaffigan and Nick Offerman will perform, too.

"I have only one great regret in life and it's that I never actually celebrated my quinceanera (a Latin girl's 15th birthday party)," said Ferrell. "I'd like to think it was just a simple oversight by my mother, but there has been a void inside me for many years.

"Growing up on the mean streets of Irvine, California, I have vivid memories of all my friends celebrating their quinceanera. Well, on April 29th at the Shrine Auditorium, with Red Hot Chili Peppers and a bunch of other really talented comedians and musicians by my side, we are going to right that wrong, and everyone is invited."

Ferrell and Smith first collaborated during a Reddit challenge that culminated in an infamous Drum Off on The Tonight Show with Jimmy Fallon in May, 2014. The stunt raised nearly half a million dollars for their respective charities.

"We had so much fun with Will on the drum off and ultimately getting the entire band together to participate on the Tonight Show," said Smith. "So much goodwill came out of one silly joke. We've been trying to find another way to get together and do some more good for our respective causes and I think we have found it."