Jane Fonda is always one to never hold back on the various endeavors she has been through in her life as she has been an actress, fashion model, and even fitness guru. The latest revelation from the 77-year-old actress may be her most revealing one yet.

The two-time Academy Award winner (Klute, Coming Home) recently told The Hollywood Reporter that while she was shooting 1980’s On Golden Pond, she had invited famous pop singer Michael Jackson to stay with her on the set for 10 days. Their time together even included a skinny-dipping session during the night. “[He] came and stayed for 10 days,” she told the outlet. “We lived together. I went skinny-dipping with him — also, by the way, with Greta Garbo!”

Katharine Hepburn was not happy with Fonda in inviting Jackson to the shoot. “When I first asked her permission, she was not happy,” Fonda recalled. “But then the crew said, ‘You don’t understand, it’s Michael Jackson.’ She was very prickly. I mean, she was a snob, she was very moody, she was very judgmental.”

Through the days, though, Hepburn eventually became fond of the singer and even sat him down as a mentor to teach him lessons. “[Jackson] wanted to be a movie star. He had just finished doing The Wiz, and he had a tape recorder with him, and every day I would bring him to the set, and in between scenes she would sit down in a chair and pull over a chair for him and tell him stories,” Fonda continued. “And every story embedded a lesson.”