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 News
After 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 Set
Robert's newest film Sherlock Holmes: A Game of Shadows hits theaters December 16. Watch Robert's entire Tonight Show interview tonight on NBC.