Shia LaBeouf kisses and tells – the actor revealed to Details magazine that he hooked up with his Transformers costar at the time, Megan Fox. LaBeouf defended his physical relationship with Fox by saying it’s hard to be on a movie set for six months with someone rooting to be attracted to you and vice versus without something physical happening. It is unknown whether Fox was dating anyone or a single woman when the costars relationship went from professional to physical while filming the action franchise. A representative for Fox has no comment on the story. She married actor Brian Austin Green last summer after an on and off relationship dating back to 2004.