Tabloids have speculated for years about when Jennifer Aniston would get pregnant, and now it seems the gossip magazines will soon get their wish.

Friends of Aniston and her fiancé Justin Theroux told OK! Magazine the couple is already talking about starting a family, and Aniston couldn't be more excited.

"The night he proposed, he told Jen that he wanted her to have his child," the source said. "She's been joking that in a perfect world it will happen on the wedding night."

Though Aniston would love to get pregnant at soon as possible, the friend said she will be happy whenever it happens - even if that means she has to wear a maternity wedding dress.

"In truth, she'll be overjoyed whenever it happens; if that means she has to walk down the aisle with a baby bump and do her toasts with apple cider, then so be it," the insider said.

Aniston has said in interviews for years that she'd love to have a family, so it's no surprise the 43-year-old actress is ready to have a child with Theroux.

"It's no secret she wanted a baby yesterday, so they're not wasting any time," the source said. "She's not in denial; she knows it may be difficult."

The couple still hasn't revealed any details about the wedding plans, but Aniston is set to give an interview to Chelsea Handler on "Chelsea Lately" later this fall, so perhaps she'll spill a few beans then.