Jessica Simpson pregnant

Jessica Simpson and Eric Johnson are reportedly having a baby girl. Source: Supplied

Expecting...Jessica Simpson in a recent Twitter pic. Source: The Daily Telegraph

JESSICA Simpson is reportedly expecting a baby girl.

The singer-and-actress who is engaged to former NFL star Eric Johnson is pregnant with the couple's first child and was thrilled when doctors revealed she is having a daughter.

A source told In Touch Weekly magazine: "She's telling people it's like winning the lottery, twice. Jessica really wanted to find out the baby's sex, she hates surprises. She and Eric are both so happy."

The couple who are set to wed next month in Hawaii are currently painting the baby's nursery pink and friends claim they are already considering the names Morgan and Karen.

Jessica - who was previously married to singer Nick Lachey - has made no secret of her desire to become a mother and recently admitted she couldn't wait to have kids with Eric.

She revealed: "I definitely see myself having a family with Eric, so that's exciting to think about."

The news of a granddaughter will also please Jessica's mother Tina as she recently revealed she would like more grandchildren to go with two-year-old Bronx, the son of her other daughter Ashlee Simpson and estranged husband Pete Wentz.

She said: "Obviously I'm looking forward to having more grandkids. Bronx is the love of my life. I don't mind boys or girls, I'll take anything I get. I'm not picky!"