Bethenny Frankel Reveals That She Was Paris Hilton and Nicky Hilton's Childhood Nanny

— -- Before becoming a "Real Housewives of New York City" star, Bethenny Frankel was just a nanny to two young girls named Paris and Nicky Hilton.

Frankel spoke with E! News about her upcoming appearance on the new season of "The Real Housewives of Beverly Hills," and revealed that she used to be a nanny for the socialite sisters, carpool duty and all.

"I've known Kyle [Richards] for years," Frankel said of the actress. "I used to work for Kathy Hilton and take Paris and Nicky to school and so I knew them through Kyle, who's a friend of mine and she was coming into town so I got together with her in the Hamptons."

Richards has previously acknowledged her longtime friendship with Frankel, 44, posting a "flashback Friday" picture of the two "Real Housewives" stars posing together.