It appears Mila Kunis could be hiding a baby bump, after she was spotted wearing a baggy shirt while out to lunch with fiance Ashton Kutcher on Monday.

Mila Kunis Baby Bump? PHOTOS

The former That 70s Show co-stars were spotted out together in Beverly Hills and Kunis' choice of clothing has sparked speculation that she is potentially hiding pregnancy news. Daily Mail posted photos of the actress wearing a gray, long-sleeved baggy top, which hung loosely around her stomach.

Kunis also wore jeans and a belt on the outing, while her fiance wore a plaid button-up with a grey t-shirt and a grey hat.

Ashton Kutcher & Mila Kunis Engagement Rumors

The two were having lunch in the big city, where they were seen giving each other a high five in one photo and looking happy in others.

The couple has yet to make the engagement official although sources say that it will probably be a while until wedding bells are heard.

"It won't necessarily be a short engagement," a friend of the couple told People. "They haven't begun planning the wedding yet."

"It's a simple band with a round diamond," the friend mentioned about the ring that was spotted on Kunis's finger. "No baguettes, no insets. It's not ostentatious, like a Kim Kardashian ring. She doesn't need a security team with her to wear it. It's a lot like her and Ashton."

According to the site, the couple started dating in 2012.

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Tags: mila kunis Ashton Kutcher