And you won't believe what he once did to a guy defending her honor.
Read on to find out what a very open LaBeouf has to say about his former Transformers costar. Plus, guess which former child star he once went on a date with...
"Look, you're on the set for six months, with someone who's rooting to be attracted to you, and you're rooting to be attracted to them," he says in the new issue of Details magazine after he apparently nodded "affirmatively" when asked if he and Fox hooked up. "I never understood the separation of work and life in that situation. But the time I spent with Megan was our own thing, and I think you can see the chemistry onscreen."
Whether or not she was involved with her now-husband Brian Austin Green at the time is still unclear. "It was what it was," LaBeouf says.
Despite all of the media attention given to LaBeouf and his bad-boy behavior, at least one major Fox incident never made it into the papers. "[H]e and Megan Fox were at a Taco Bell and the cashier made a rude comment to her and LaBeouf wound up going behind the register and whaling on the guy," according to Details.
Fox's rep declined to comment.
Other highlights of the story (and there are many!) include his admission that he and Transformers: Revenge of the Fallen costar Isabel Lucas were "philandering around" during the time he rolled his truck in a late-night accident in L.A., he remains pals with ex Carey Mulligan and he once had dinner with Hilary Duff. "Probably the worst date either of us has ever had," he says.
LaBeouf also criticizes (once again) Indiana Jones and the Crystal Skull, Transformers: Revenge of the Fallen and Wall Street: Money Never Sleeps.
He doesn't make any apologies for the numerous fights he's gotten into, even if they land him in handcuffs. He says he's an easy target.
"This is not to be comparing myself to [Leonardo] DiCaprio, but I remember the hatred for him when every girl I liked wanted to...," he says before pausing. "It's not extraordinary envy, like Robert Pattinson fan-worship s--t, but I do feel animosity from men. They feel like they want to challenge me. 'I just f--ked up Shia LaBeouf!' It's a story you can tell, and I guess you're cool for it."
But ya may want to think twice before instigating something with Mr. LaBeouf—just ask the dude at Taco Bell.