Born in Paris, Forquet made his film debut in 1960 in La Menace while still an art student and over the next few years became popular in France.
It proved popular with both European and American audiences and Forquet travelled to Hollywood to work for 20th Century Fox.
He co-starred with Sandra Dee in Take Her, She's Mine as her romantic interest, and while the film was popular, it did not lead to other projects.
During this time, Forquet became engaged to the American actress Sharon Tate, but the relationship ended because of career conflicts.
In 1969, he co starred in the film Camille 2000, a remake of the famous Alexander Dumas story The Lady of the Camellias.