VIDEO : Megan Fox Reveals Secret Crush-- on Letterman!

Megan Fox has been linked to her co-star Shia LaBeouf and engaged to Brian Austin Green, but the sexy bombshell only has eyes for one man.

While making her promotional rounds for Transformers: Revenge of the Fallen on the Late Show with David Letterman Thursday night, Fox opened up to David Letterman regarding her crush on him!

Fox played coy as she proclaimed:  Can I tell you something?  I’ve had only three crushes my whole life; Jon Stewart, Conan O’Brien, and you.”

Not sure if Letterman took it as a compliment being mentioned along with his contemporaries as he replied, “Thank you.  What do the other two do?”

Watch the Fox and Letterman love connection.