Bo Derek, 66, left fans doing a double take after stepping out in a tiny bikini that showed off her timeless figure. Some couldn’t believe her age at first glance! New photos in the comments.

Long before she became the iconic beachside star of 10, Bo Derek was Mary Cathleen Collins—a California girl more at home in stables than on film sets. Her rise to fame was swift and often overwhelming, shaped by a highly publicized relationship with director John Derek and a series of roles that kept her in the spotlight. But when John passed away in 1998, the woman once labeled a perfect “10” was left grieving deeply, unsure she would ever find love again. Instead of pursuing roles that no longer resonated with her, she chose to step away from Hollywood on her own terms.

Away from the spotlight, she returned to what she loved most—animals. She became deeply involved in horse care and broader animal advocacy, while also dedicating time to supporting U.S. veterans. Years later, love reentered her life quietly through a long friendship with actor John Corbett. After more than two decades together, the couple married in an intimate, private ceremony. Today, Bo Derek lives a peaceful life on a ranch, surrounded by animals and open land—having traded fame for something far more personal and lasting.