UPDATE: Unfortunately, it sounds like this Pretty Woman isn't getting ready to have another little pretty baby. Julia Roberts denied pregnancy rumors during a December 12 appearance on CBS' Late Show With David Letterman. When asked if she'd ever thought of having a fourth child, a smiling Julia replied, via E! Online, "Oh, sure." But when Dave asked if there was any chance of it happening, she flatly responded, "No."

Original story, December 11: As a 46-year-old mother of three, few people would expect Julia Roberts to have another child. However, pregnancy rumors immediately started swirling when the August: Osage County star was recently spotted in L.A.

On Sunday, December 8, Julia was photographed putting up Christmas decorations with her husband, Danny Moder. The A-list actress seemed to be showing off a prominent bump beneath her sweater, which is uncharacteristic of her trim physique.

For the last few months, Julia’s been hiding her figure under tummy-concealing outfits. In early November, the actress opted for a loose-fitting black frock when she presented at the 2013 BAFTA LA Britannia Awards.

If Julia is indeed pregnant, this would be the fourth child for her and her cameraman hubby. The duo wed in a private New Mexico ceremony in 2002, and have since given birth to 9-year-old twins Hazel and Phinnaeus and 6-year-old Henry.

While we’ve yet to get a confirmation that Julia’s expecting, she certainly wouldn’t be the first to have a baby after 40. Major Hollywood players like Halle Berry and Mariah Carey have welcomed children later in life... and now of course, we’ve got another mini Stefani on the way!