Shia LaBeouf's first kiss was one he'll never forget.

The now 33-year-old actor shared the on-screen smooch on the set of Even Stevens. The Louis Stevens star recalled the memorable moment in an interview with W Magazine published Friday.

"The producers knew I had a crush on this girl, and they wrote a scene where we kissed," he told the magazine about his first peck. "I was nervous. I matured late that way."

LaBeouf didn't reveal the name of his childhood crush. However, there was a season three episode called "The Kiss" in which Louis kissed Margo Harshman's character Tawny Dean. There was also an episode called "Beans on the Brain" in which he kissed Spencer Redford, who played the cousin of Steven Anthony Lawrence's character Beans.

This wasn't LaBeouf's last on-screen kiss. The Disney celeb also puckered up with Dakota Johnson for the movie Peanut Butter Falcon. In fact, he cited the 30-year-old actress when asked to list his best on-screen kiss during a round of Ellen DeGeneres' "Burning Questions" game. Well, sort of. After DeGeneres asked him about a lie he told recently as a follow-up question, LaBeouf said, "I just told one, just now. The question right before."