Watch your back, Eminem - there's a new white rapper in town ready to take your crown, and he's already mega-famous.

Chris Pratt and Shia La Beouf have previously demonstrated their rapping ability on air, but now Ryan Phillippe has thrown down the gauntlet during an appearance on Sway's Universe on Sirius XM.

The actor was on the show to discuss his new film 'Wish Upon' and his new TV show 'Shooter', but surprised everyone at the end of the interview when he pulled out some pre-written rap verses that referenced everything from his own career to Donald Trump.

He recently directed a couple of videos for rapper Post Malone, so maybe a career change is on the cards.

Watch it below: