Channing Tatum posted a VERY naked photo of himself on Instagram.

The actor, who just celebrated his 39th birthday last weekend, revealed he lost a bet to his girlfriend Jessie J after she beat him at a game of Jenga—and his punishment was posing nude in the shower with nothing but his hands covering his private parts.

"I lost a game of Jenga to Jessica Cornish," he explained in the caption. "The loser (me) had to post a picture the other person (Jessica Cornish) picked... Smh and fml... I’m never playing Jenga with her ever again..."

FYI: In case you didn't know, Jessica Cornish is Jessie J's real name.

The "Bang Bang" singer also took to the comments section of the pic to share a flirty response, writing, “Sharing is caring" alongside the heart-eye and fire emojis.

The couple started dating back in October 2018, and though they kept their relationship low key at first, they've been showing off a lot of PDA on social media lately. In March, the Magic Mike star posted this sweet tribute for his lady on her birthday.

“Wishing you the happiest day filled with all the love and all the light,” he wrote. “You came into this world on this day and lit it on fire. You have blessed our eyes, our ears, our hearts and our lives. So thank you for just being you. You are so very special. Happy birthday Baby.”