London: 'Iron Man' star Robert Downey Jr has revealed that he and his wife Susan Levin are expecting a baby boy together.

The 46-year-old actor is expecting his first child with Levin and Downey Jr has seemingly confessed the baby's gender, reported a website.

"I am not permitted to discuss it. I keep dropping the ball everywhere - she (Susan) says, 'Don't tell your cousins', and then I tell them. I can't say a word... Well we're having a boy," he said.

The actor, who has an 18-year-old son, Indio, from his previous marriage to Deborah Falconer, also said that the baby is due in February.

"It's due in late February," he added.