Audrey Hepburn & William Holden. During the filming of Sabrina some biographers allege that Holden & Hepburn became romantically involved, and she hoped to marry him and have children. It is rumored she broke off the relationship when Holden revealed he had undergone a vasectomy, which was not reversible in the 1950s. They starred in Paris When It Sizzles in 1964. Holden tried to rekindle a romance, but Hepburn was married. This combined with his alcoholism made filming a challenge.