(Cover) - EN Showbiz - Jennifer Aniston's "incredible bosom" had guests at the Glamour Women of the Year awards speculating that she may be pregnant.

The Hollywood star arrived at the Carnegie Hall in New York on Monday night with her partner Justin Theroux.

The stunning actress showed off her enviable frame in a low-cut black dress, which was short at the front, and draped into a flowing train at the back.

The Versace gown highlighted Jennifer's curves, including an "incredible bosom" as described to the New York Post by one onlooker at the prestigious event.

Other guests at the event noticed Jennifer's protective behaviour. She was spotted "holding a glass with ice near the bar" but "no one saw her drinking alcohol."

Jennifer and her beau later enjoyed dinner together at The Modern.

Jennifer recently denied she was starting a family with Justin, 40.

The 42-year-old beauty put her weight gain down to healthy living.

"It's just I quit smoking, so I've gained a couple of pounds," she previously revealed.

A representative for Jennifer didn't respond to the rumours. (C) Cover Media