Megan Fox is making a comeback. And how! The Transformers star took to social media to share a racy photo which shows her flaunting her gorgeous figure.

The mother-of-three is seen partly exposing her breasts and flat tummy in a sexy sheer black lacy bra in a selfie she shared with her 4.3 million fans on Instagram without a caption.

Her fans are obviously delighted as the actress looks better than ever in the photo. "The most beautiful Woman on earth ," a fan commented.

Another wrote, "Even though the picture is flattering... OMG. But you don't need a pic like this to show off. #realfans know what's up."

"I like the megan I see on new girl, no need to do this for empowerment, your beauty is like no other," one fan said, while another added, "My god you're gorgeous. Please post more. You are missed."

The 31-year-old actress looks stunning with her incredibly well-maintained figure, after keeping a low profile since welcoming her third son in August 2016.

Speaking about her physique, Fox, who became an overnight sex symbol thanks to her role in the 2007 Transformers flick, revealed her fitness secret in an interview with E! Online in 2014.

"I cut out all bread and those sort of carbohydrates. No crackers, no pretzels, no chips. Nothing unhealthy. The worst thing I put in my body is coffee, once a day," she told the celebrity news website. "I don't have any cheat days. But if I did, it would be pizza or cake."

"I exercise really hard twice a week. I got my a-- kicked this morning before I came here. I do bursts of cardio with really heavy weights. Circuit training," she added.