Lisa Rinna shows off slim bikini body at 51

LOS ANGELES, April 1 (UPI) -- Actress Lisa Rinna took to Instagram Tuesday to share a photo of herself in a tiny black bikini.

The 51-year-old star, best known for her roles in Days of our Lives and Real Housewives of Beverly Hills, looked slim and toned as she posed next to a pool in the photo.

"Is it too much? Enough already? Aah [expletive] it. I'm 51," she captioned the photo.

A photo posted by Lisa Rinna (@lisarinna) on Mar 30, 2015 at 9:27pm PDT

According to Us Weekly, the reality star is taking a vacation in Belize. Rinna returned to the small screen Tuesday in the first episode of Bravo's Real Housewives of Beverly Hills reunion special.