Jennifer Aniston
Jennifer Aniston has been voted the "Hottest Woman of All Time" in a poll. Reuters

Jennifer Aniston is reportedly pregnant with twins just months after hooking up with her actor boyfriend, Justin Theroux.

According to Star Magazine, a source close to the Aniston revealed that Christmas has come early for the Friends star who is finally expecting with the help of fertility treatment.

The source told the magazine: "Months of fertility treatments make her dream come true.

"She's been taking fertility drugs, which can lead to multiples.

"Jen thinks she's having twins," the source added.

Even though Jennifer has previously denied rumours that she has a bun in the oven, new reports have surfaced that the Hollywood actress is not only pregnant for her actor beau but she is also expecting twins.

A neighbour has now revealed that the A-list actress, who has hidden her desire to become a mother, appears to now have a "baby bump."

The neighbour who spied on the beauty told the magazine: "Jen definitely looks pregnant. My kitchen window overlooks a bedroom in Jen's house, and I see her changing clothes from time to time. She seems to have a baby bump - it's more than just a bloated belly.

"She's had lots of friends visiting, bringing her things. And when they're there, she doesn't lift a finger. She's always hanging out on the couch and eating Häagen-Dazs."