It's a boy. Actually, it will be a boy! Jessica Simpson revealed that she is expecting a son while appearing on 'Jimmy Kimmel Live!' last night (March 6.)

While confessing to the late night talk show host that she has had a tough pregnancy, she also spilled the beans about the baby's sex. “I just feel awful. I’ve been vomiting. I had no idea that a wiener can make me nauseous," she said.

She continued, “Oh shucks! Well I guess told the world that I was having a boy. I just outed that I am having a boy. I can’t believe I did that. It was not planned."

Sure, it wasn't! We're still stuck on the fact that she said "wiener" when referring to her unborn son.

Simpson's daughter, Maxwell Drew, will turn 1 on May 1.