Actor JOSH DUHAMEL has hinted his pregnant wife FERGIE is expecting a baby boy after repeatedly referring to their unborn child as a 'he' during a new interview.

The Transformers star and the Black Eyed Peas singer will become first-time parents later this year (13), but they have yet to publicly reveal the sex of the tot.

However, Duhamel appears to have let their secret slip during a recent chat with The Associated Press.

Discussing the need to childproof their Los Angeles home, the excited dad-to-be said, "You know your kid is going to get - he's going to fall and bump his head. And he's going to do all of those things."