He's got a lot of explaining to do!

Will Smith and his Focus co-star Margot Robbie got a little too cozy with each other in a photo booth at the wrap party for their film in New Orleans on Oct. 25, and now the latest issue of Star magazine is exposing the sexy shapshots and claiming the actor is cheating on wife Jada Pinkett Smith!

The A-list star and the Aussie actress are shown lifting up their shirts and exposing their chests in the photos, and this is certainly not the behavior of a happily married man!

"Once they pulled the curtain back to take the pictures, they let their inhibitions run wild, laughing, hugging and nuzzling each other in the dark," an eyewitness told the mag.

Things aren't always what they seem, or at least that's how they are trying to spin the scandal!

"The photo booth was on set. The whole cast and crew were there and everyone was sharing all the photos being taken. They are just friends and were just being silly," a source tells People.

Would you want your husband behaving like this?! We think not!