A native of Long Beach, California, she spent her early life in Los Angeles and Mexico City, raised by her widowed father. While working as a model in San Francisco, she met and married John Phillips in 1962 and went on to co-found the vocal group the Mamas and the Papas in 1965. The band rose to fame with their popular singles "California Dreamin'" and "Creeque Alley", both of which she co-wrote. They released five studio albums before their dissolution in 1970. With John Phillips, she gave birth to a daughter, singer Chynna Phillips.