Later that year she was cast in the role of Yvonne, Humphrey Bogart's character's discarded mistress, in Casablanca. Warner Bros. signed her to a $100-a-week contract for twenty-six weeks to be in a number of films. On 22 June, while she was filming her scenes in Casablanca, her husband, Marcel Dalio, who played Emil the croupier in the same film, filed for divorce in Los Angeles on the grounds of desertion. They divorced in 1942. Shortly before the release of the film, Warner Bros. terminated her contract. After Joy Page died in April 2008, Lebeau was the last surviving credited cast member of Casablanca.