(Cover) - EN Showbiz - Jessica Simpson has finally admitted that she is pregnant.

There has been speculation for many months that the 31-year-old reality star turned fashion mogul is expecting her first child.

She was seen with a growing bump over recent weeks as she travelled around the country and was frequently seen shielding her belly with a large handbag.

But Jessica chose Halloween to reveal the happy news and posted a picture of herself on her website dressed up in an apt costume with her stomach on full display.

"It's true, I'm going to be a mummy!" the singer wrote by the image which showed her holding her bump and dressed all in white as a mummy.

Jessica got engaged to NFL professional Eric Johnson, 32, back in November after six months of dating.

"I met a wonderful man," she tweeted about Eric last month. "Damn, I'm lucky."

"Every day is a romantic day with him. I'm very blessed."

However, Jessica's wedding plans are still said to be undecided as she doesn't know what kind of ceremony she wants to have.

"Some says she wants a big wedding in Hawaii, then other days she wants something closer to home," a friend told Us Weekly recently.

The baby will be the second grandchild for Jessica's parents. Her sister Ashlee is mother to nearly three-year-old son Bronx with her ex-husband Pete Wentz. (C) Cover Media