John Goodman will be celebrating his birthday this weekend with a lot less pounds under his belt.

On Wednesday’s broadcast of the Late Show, the almost 58-year-old Treme star - who recently surprised photographers at AFI’s Tribute to Mike Nichols - discussed his dramatic weight loss with David Letterman.

Although Goodman didn’t exactly saw how he downsized, the actor did admit he was “pushing 400” pounds at one point. Whatever the method, he looks fantastic.