Sitting down with ETonline's Ashley Crossan on Tuesday to promote his upcoming crime drama Lost in the Sun, the 42-year-old star opened up about how his son is growing up, developing a personality, and starting to look more and more like Fergie.
"He definitely looks like my wife. I look at those two together and I'm like, 'Wow! that's amazing! I'm not even sure if this is my son!'" Josh said, laughing.
"He knows what Halloween is and he loves watching his Halloween videos. It's not just five little monkeys jumping on the bed, now it's five little zombies jumping on the bed," he said. "The big question is whether or not he's going to be a construction worker or a Teenage Mutant Ninja Turtle."
Themes of fatherhood and paternal instinct play a big role in Duhamel's upcoming film Lost in the Sun. In the film, he plays a small-time crook who befriends a young orphan boy and the two form a close bond as they commit a string of crimes.