Jessica Simpson has accidentally confirmed she is having a baby boy.

The 32-year-old beauty - who has a 10-month-old daughter Maxwell and is pregnant with her second child with fiance Eric Johnson - wanted to keep the sex of her little one a secret but while talking about how she was been suffering "awful" morning sickness, she accidentally let the information slip.

Speaking on Jimmy Kimmel Live yesterday, she said, "It's a total different pregnancy. I just feel awful. I've been vomiting. I had no idea that a wiener can make me nauseous. 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. It was kind of out and about in the press that I was having a boy. I was like 'How do people know these things'?"

The Fashion Star mentor also revealed she has planned her wedding to the retired NFL star a number of times but has to keep postponing the big day because she is always getting pregnant:

"I keep planning on getting married, but I keep getting knocked up. It's just one of those things. Maybe I should go back to when I was younger, I was a virgin before I was married, so maybe I should just completely reverse and stop having sex altogether until Eric and I actually say I do."