Natividad was born in Ciudad Juárez, Mexico, the eldest of nine children, and did not speak English until she was 10. At that time, her mother married a U.S. citizen and they moved to Texas.Natividad attended high school in El Paso, where she was her senior class president. After moving to California, she worked as a maid and cook for Stella Stevens and as a key-punch operator for IBM before turning to go-go dancing to make ends meet. Her stage name Kitten came from her shyness.At age 21, she had her first breast implant surgery in Tijuana (where it was legal) on the advice of her agent. Kitten Natividad was introduced to Russ Meyer by fellow dancer Shari Eubank, a performer in Meyers 1975 film Supervixens. Meyer hired her to narrate his movie Up!, where she was shown sitting nude in a tree, quoting the poetry of Hilda Doolittle and acting as a Greek chorus to the nonsensical action. Meyer was so impressed he wanted her to star in his next feature, Beneath the Valley of the Ultra-Vixens, one of several collaborations between Meyer and film critic Roger Ebert.