the 59-year-old Real Housewives of Beverly Hills star showed off her flawless physique in a series of swimwear photos.
"an extra Sun-centered orbit. It is 59 now "In the caption of a photo of herself in a Melissa Odabash bikini with a safari print,
Rinna boasted about her physique. She finished her look with a bucket hat with prints.
With activist and fellow model Paulina Porizkova writing: "And killing it," Rinna's followers didn't waste any time expressing their ideas.
There has never been a 59-year-old who looked better! Added TV producer and showrunner Gary Janetti.
Congratulations on your birthday, you enduring icon! Written Hilton Perez. "HAPPY BIRTHDAY STUNNER," said RuPaul's Drag Race judge Michelle Visage.
Fashion designer Marc Jacobs wished Lisa a happy birthday. Leslie Jordan, an actor, wished his beloved a happy birthday.
Rinna has consistently accepted her age and urged her followers to do the same.
After one of Porizkova's Instagram fans criticised her for uploading a photo of herself wearing a white bikini, she defended Porizkova in May.
Porizkova shared a remark made by an online troll at the time, which read: "You must be in tremendous pain if you're still posting bikini images at your age.
I've always thought that those who were attractive had the worst time ageing and become ugly.
The fall from grace was far more dramatic when you were beautiful. I hope you can acknowledge your mortality."
Porizkova responded to the troll by reposting the bikini picture and writing, "There is no such thing as ugly and elderly, only shortsighted and uninformed.
Rinna replied by posting a picture of herself wearing an olive-green string bikini and a similarly strong statement.
"Paulina Porizkova shared a photo of herself in a bikini and she was branded old and unattractive for doing so,"
the Days of our Lives alum tweeted. Consider me "old and ugly" since I'm 58.