Annette Stroyberg (7 December 1936 – 12 December 2005) was a Danish actress. Her films included Les Liaisons Dangereuses (1959), which was directed by her first husband, Roger Vadim.

Spouse(s) Roger Vadim (1958-1960; 1 child)
Gregory Callimanopulos (divorced; 1 child)
? (divorced; 1 child) 

Annette Stroyberg was born on 7 December 1936 on Funen Island, Denmark, and is related to Danish actress Camilla Soeberg as the cousin of Camilla's mother. Prior to 1958, Stroyberg appeared as a cover girl, most notably in an advertisement for Tuborg beer. In 1958, aged 21, she appeared in the film Les bijoutiers du clair de lune, directed by Roger Vadim, starring Gérard Philipe and Jeanne Moreau. During this production, she and Roger Vadim, a recent divorcé from Brigitte Bardot, fell in love and married on 17 June 1958. They gave birth to Nathalie Vadim, who went on to be a film director.

Stroyberg and Vadim divorced in 1960.

Having lived with Vittorio Gassman for a couple of years, and had liaisons with Alain Delon, Omar Sharif and Warren Beatty, Stroyberg married a French Moroccan, enrolled at the Sorbonne and divided her time between Paris and north Africa. When this marriage ended, she married a Greek shipping magnate, Gregory Callimanopulos, and settled in America.

In February 1986, former husband Vadim published Bardot, Deneuve, Fonda -- My Life With the Three Most Beautiful Women in the World, a book about Vadim's relationships in which Stroyberg is written as passing "in and out of the other four lives" such that the there is at least as much in the book about Stroyberg as the three women named in the book title. After the break-up of her relationship with Callimanopulos in the early 1990s, she returned to Europe, living in Paris and Copenhagen, where she was part of the circle around Queen Margretheand Prince Henrik. She had three children, one from each of her marriages.

She died of cancer in Copenhagen, Denmark, on 12 December 2005, aged 69.