Sebring was introduced to Sharon Tate by journalist Joe Hyams in October 1964 and they began a relationship. Sebring bought the former home of Paul Bern, husband of Jean Harlow, on Easton Drive in Benedict Canyon, then owned by Sally Forrest.
Tate went to London in early 1966 to work on The Fearless Vampire Killers with film director Roman Polanski. They began a relationship, and Tate ended her relationship with Sebring, who travelled to London to meet Polanski. He befriended Polanski, while remaining a friend to Tate. Polanski would later comment that despite Sebring's lifestyle, he was a very lonely person, who regarded Tate and Polanski as his family.
In the summer of 1968, Roman Polanski and Sharon Tate introduced Sebring to Polanski's friend Wojciech Frykowski and his girlfriend, coffee heiress Abigail Folger, who had recently moved to Los Angeles from New York. Folger later invested in Sebring's hair-care products for men.
In early May 1969, Sebring opened a new salon at 629 Commercial Street in San Francisco, and a champagne reception followed. Guests included Abigail Folger and her mother, Ines, as well as Paul Newman and his wife, Joanne Woodward.