TV Robert Downey Jr. Reveals Baby's Gender By Raphael Chestang 8:19 PM PST, December 5, 2011 NBC Robert Downey Jr. sat on Jay Leno's couch on Monday, dropping some big news concerning his unborn child due in late February.MORE: Robert Downey Jr. Baby NewsAfter laboring over how he's not currently at liberty to reveal the baby's gender, the Golden Globe winner feigned accidently spilling the beans."We're having a boy," Robert blurted, covering his face in pretend shame.MORE: Hollywood Honors Robert Downey Jr.Robert and producer Susan Downey have been married for six years. Although Robert has one child from a previous marriage, this is Robert and Susan's first child together.MORE: EXCLUSIVE: On the Game of Shadows SetRobert's newest film Sherlock Holmes: A Game of Shadows hits theaters December 16. Watch Robert's entire Tonight Show interview tonight on NBC.