One is a member of The Real Housewives Of Beverly Hills while the other is an alum of The Real Housewives Of New York City.
And on Monday, West Coast-based Lisa Vanderpump flew across the US to join Kelly Bensimon at the Stop Ebola And Build For The Future Concert at United Nations Headquarters in New York.
The two reality TV stars looked chic for the fundraiser with Lisa, 54, in a stunning, blue, knee-length dress with a scooped neckline.
Chic clique: Real Housewives Of Beverly Hills star Lisa Vanderpump, left, and Real Housewives Of New York City alum Kelly Bensimon turned out for the Stop Ebola Concert at the United Nations HQ in New York on Monday
The flattering frock fitted her curvaceous figure like a glove and she teamed it with a blue belt with a blingy buckle and simple black pumps.
The Vanderpump Rules star accessorised with a triple-strand pearl necklace and blingy earrings, with her long brunette tresses smoothed out and styled to frame her perfectly made up face.
She was with her husband of 33 years, Ken Todd, and their pet dog Gigi.
Friends in high places: The 54-year-old and UN Secretary-General Ban Ki-moon both spoke at the event
In good company: The brunette, who arrived with her husband of 33 years, Ken Todd, wore a striking, skin-tight blue dress with black pumps
Kelly Bensimon, who appeared in The Real Housewives Of New York City, chose a classic little black dress with black opaque tights and black suede high heels.
The 46-year-old’s blonde hair fell in gentle waves and she smiled on the red carpet, holding a black clutch bag.
Lisa, who is also a restaurateur, philanthropist and author, took to the podium to address the audience.
Keeping it simple: Kelly, 46, was understated and elegant in a thigh-length little black dress
The British-born celebrity wrapped her speech saying: ‘Ebola is not West Africa’s disease, it is ours. Let us remember silence, apathy, a lack of support equals fatalities.’
She was followed by UN Secretary-General Ban Ki-moon, and the pair later posed for photographs.
The event was hosted by NY1 anchor and author Cheryl Wills, who looked stunning in a full-length, dark pink, satin gown with a pattern of large light pink roses.
And puppy came, too: The Brit celebrity held up her pampered dog Gigi at the reception
Other celebrities expected to attend or take part in the event included Jackie Chan, Jeffrey Wright, Derek Jeter, Naomi Campbell, Timbaland, Salt and Peppa, Gambian-British musician Sona Jobarteh, Guinean singer Lama Sidibe and Jamaican reggae singer Etana.
Led by the United African Congress, Give Them A Hand Foundation and the Friendship Ambassadors Foundation, the event aimed to raise funds to provide health clinics in Ebola-hit countries.and help children orphaned by the deadly disease.
Floral tribute: The evening was hosted by NY1 anchor and author Cheryl Wills, who looked stunning in a full-length satin gown with a pattern of large pink roses.