The former Friends star is reportedly six-months pregnant.
Aniston, 42, fueled speculation she might be in for a happy event when she recently sported a visible baby bump that tried to hide under a wide coat.
“She wouldn’t have wanted to make a big deal, but she must be so excited,” a friend of the star told Look magazine.
“If anyone ever asked if she was worried about running out of time, she’d reply, ‘I’m absolutely having kids there’s not one doubt in my mind’.”
Jennifer quashed pregnancy rumors last October when she and boyfriend Justin Theroux were seen leaving a clinic. The couple had fertility treatment last year.
In addition, she managed to give up her habit of smoking but she denied reports that pregnancy was the cause.
If the rumors prove to be true, this could be Aniston’s first child. Meanwhile, reports have surfaced that her ex-husband Brad Pitt and Angelina Jolie could become parents for the seventh time.