Bayonas, an European actress, moved to Los Angeles from Madrid, Spain. She belongs to a family of filmmakers. She started working in films at the age of four years old and since then she has accomplished a strong career in Europe, with leading roles in film and TV with well known Spanish directors, like Jose Luis Bunuel, Jaime Chavarri, Julio Medem, Alfonso Ungria, Fernando Fernan Gomez, Jose Luis Cuerda, Manolo Matji, Jose Luis Berlanga and others.

She received her biggest media attention as a controversial artist as part for the cultural wave originated from Madrid, "La Movida". She was considered a mysterious, dark and complex actress as in all her roles she played. She broke that image and surprise the media and film critics by appearing on the cover of Interview magazine, as she wanted to seduce director Bigas Luna to play the lead in the "The Ages of Lulu".

She published the novel "Yes Father, no Father", a radical critic against parental education, which was a best seller in the 90's. She received an award for her first screenplay "Panfilas" by ICAA, Ministerio De Cultura of Spain. She played her first lead at the age of seven in" Correo De Guerra" ,1972 She studied Piano for ten years guided by her Godfather, the well known Classic pianist Manolo Carra and studied for 5 years with John Strasberg (Actors Studio New York). She is the daughter of Lola Salvador, a well known scriptwriter and film producer.

Her career was interrupted because of the serious illness of her son William Grubb-Bayonas, who together fought for 20 years, finally loosing the battle to cancer. Bayonas is a founder member of the "Academia De las Artes y las Ciencias Cinematogricas of Spain" (GOYA awards). Her most recent work in Hollywood is Lewis Teague's, "CharlottaTS",( 2011).