Kyle Richards' "Real Housewives of Beverly Hills" co-star, Lisa Rinna, shared an impressive photo of her bikini body over the weekend while in the Bahamas for an interview on "Live with Kelly and Ryan." A short time later, Richards took to her Twitter page to applaud the 54-year-old reality star and soap actress on her toned physique. Unfortunately, Richards' kind message to her friend resulted in some unwanted criticism in regard to her own frame.

"I have to say ... [Lisa Rinna] kills it all day long," Kyle Richards wrote in response to her co-stars' now-viral photo.

In the photograph, Rinna was seen posing with her arms above her head as she stunned in a lacey black bikini in a bathroom. As "Real Housewives of Beverly Hills" viewers well know, Rinna takes good care of her body and never hesitates to show it off. In fact, throughout her vacation in the Bahamas, she's been sharing a number of photos of herself in bikinis.

Kyle Richards fights back against weight backlash

In response to Kyle Richards' comment about Lisa Rinna's hot bod, Twitter user @markamunoz1 offered a stern message to the mother of four, telling her that if she would lose 60 pounds, she'd look just as good as Rinna. "Get of the carbs," the person added. Shortly thereafter, Richards quoted the message on her own Twitter page and added a message of her own.

"Thanks for the helpful tips," she tweeted, along with a thinking face emoji.

As soon as Richards' message was shared, a number of people flooded her with comments applauding her for her beauty and slamming the Twitter user for making such a harsh statement about her weight. After all, Richards looks incredible and if she were to lose 60 pounds, she'd surely look quite unhealthy.

Kyle Richards spoke about her weight struggles in 2015

During a March 2015 interview with People magazine, Richards admitted that she's simply not someone who can just eat whatever she wants. “I’ve always battled my weight," she explained. "I’m much curvier than my sisters. It’s always been my Achilles heel. The struggle is real!” Continuing on to the magazine, Richards said that she's always been someone who has to eat way less than others and work out way more just to be able to remain at the weight she is currently.

To see more of Kyle Richards, Lisa Rinna, and their co-stars, don't miss new episodes of "The Real Housewives of Beverly Hills" season eight on Tuesday nights at 9 p.m. on Bravo TV.