John Stamos
John Stamos donned his birthday suit to celebrate his special day. Pictured: The “Fuller House” actor attending Nickelodeon’s Kids’ Choice Awards at USC Galen Center in Los Angeles on March 11, 2017. Getty Images/Frazer Harrison

John Stamos almost left nothing to the imagination when he uploaded a nude photo on social media in celebration of his 54th birthday.

On Saturday, the “Fuller House” actor took to Instagram to share a snap of him taking an outdoor shower while completely naked. Though the actor is somehow concealed by the plants in the garden where he is taking his bath, his bare bottom is totally visible in the photo.

Interestingly, Stamos may have intentionally uploaded the nude picture for two reasons: first, he did it to prove that he is “#54 and clean”; second, he posted it as a sign of thank you to the fans and friends who sent him “birthday wishes.”

Stamos may have pointed out in his post that he is “clean” to assure the people who love him that he has put his alcoholic days in the past. It can be noted that the actor got arrested in 2015 for driving under the influence. He also went to rehab for treatment, Daily Mail has learned.

Meanwhile, Stamos’ “Fuller House” co-actors were among the people who greeted him on his birthday on Aug. 19. Lori Loughlin uploaded a clip showing her and Stamos performing a dubsmash of a “Step Brothers” scene, and she also greeted the actor saying, “Happy Birthday to this ageless vampire! Thank you for all the years of love, laughter and fun!”

Jodie Sweetin also took the time to greet Stamos and she did not forget to compliment the latter’s ageless looks as well. “Happy Birthday [John Stamos], my Uncle J! Love you so much. And you don’t look a day older than when this picture was taken.” Other “Full House” alums who greeted the birthday boy include Candace Cameron-Bure, Bob Saget and Dave Coulier, according to ET Online.

Stamos is currently dating Caitlin McHugh. He was previously married to Rebecca Romjin from 1998 to 2005. Speaking of her romance with the hunky Hollywood actor, Hugh gushed to Entertainment Tonight earlier this year, saying, “I’m very happy, he’s super supportive, and I really couldn’t ask for anything better.”

“We like to keep our lives private because we’ve seen what relationships in the public eye can be like and we just like our privacy. We don’t want the commentary from the masses about what our relationship is or should be,” she added. “We’re very happy together and we hope to be so for a long time.”