Lillian Müller (born 19 August 1951[2]) is a Norwegian model and an actress in motion pictures and television.

[4][5] In 1978, she portrayed Rod Stewart's love interest in his video "Da Ya Think I'm Sexy?".

In the bulleted list, all appearances as Yuliis Ruval: In 2010, she was also featured in a Norwegian television show about Norwegian women having success in Hollywood, the show was titled Ja, vi elsker Hollywood!

)[7] In 2012, she appeared in season 8 of Skal vi danse?, the Norwegian version of Dancing with the Stars,[3] being partnered with Glenn Jørgen Sandaker.

She was in a relationship with Playboy founder Hugh Hefner between 1976 and 1977,[8] and has also been romantically linked to actor Tom Selleck.