We believe him, too!

Dax Shepard was forced to deny he cheated on wife Kristen Bell yesterday, after Daily Mail published photos of him making out with Julie Andrews' step granddaughter Kayti Edwards.

Edwards claimed she had sex with the actor two years in to his relationship with Bell in 2009, but he swears she's bold face lying.

"Hey Daily Mail, that photo is 13 years old, not 9. Also, Kayti has sold stories to tabloids about Matthew Perry, Jack Osbourne, Kid Rock, and now me. I look forward to her next one. Fingers crossed it's about my #1, Brad Pitt :)," he wrote on Instagram.

That's not how she recalls it.

"I was house-sitting for a girlfriend of mine in Hollywood and there was this party. I think it might have been someone's birthday party or some kind of big event, a lot of celebrities were there, it was at a nightclub in Hollywood. I saw him and we hadn't seen each other in a few years. So it was like a very friendly, 'Oh my gosh, I haven't seen you in forever. Nice to see you. There was a photo booth and I remember people were standing in line for this photo booth. And Dax grabbed me and was like 'let's pick up where we left off' and he threw me into this photo booth with him. And it was kind of like this make out session in this photo booth that we were being overly dramatic," she told the outlet.

"He realized that there was a screen on the outside, so everybody standing in line had just seen us making out in a photo booth and we quickly waited for the pictures and he grabbed them and we scurried off. I did not have any knowledge of who he was dating or even if he had a girlfriend. But he seemed too scared about it. He just kind of was like 'Oh crap why didn't I realize that there was a screen'," she added.

So why is she going public with this now?

"I came forward with this to get ahead of the story. I posted a photo on Facebook of me and Dax from that night as a joke and recently a few media outlets have contacted me about it. In my experience I am tired of other people telling my story. And I would rather tell the true story than have this picture floating around and people running with it. I just wanted to set the story straight before someone else said something that wasn't true," she explained.

We hope this doesn't result in a divorce!