Uncle Jesse is a bonafide hottie!

John Stamos might be 51-years-old, but he's still capable of making the ladies swoon, and he proved it by donning nothing but his underwear and a pink button down to film a segment in Malibu on Monday. The actor certainly doesn't look his age!

The Full House star is busy shooting Fuller House, but just last month he found himself in the throws of addiction, which prompted him to check into rehab. We're glad to see he's doing better and getting back to work!

The sexy Greek hunk turns another year older on August 19th, and his Fuller House co-star Lori Laughlin decided to throw him a b-day BBQ this past weekend with the rest of the TV family cast to celebrate. Bob Saget, Candice Cameron Bure, Jodie Sweetin and Dave Coulier got together to help Johnny Boy blow out the candles, and it looked like quite the fete!

Serious question, though... why does he NEVER have a girlfriend? The chicks here at X17 would happy to step in and solve that problem!