Taylor made the transition to adult roles when she turned 18 in 1950. In her first mature role, the thriller Conspirator (1949), she plays a woman who begins to suspect that her husband is a Soviet spy. Taylor had been only 16 at the time of its filming, but its release was delayed until March 1950, as MGM disliked it and feared it could cause diplomatic problems. Taylor's second film of 1950 was the comedy The Big Hangover (1950), co-starring Van Johnson. It was released in May, and the same month, Taylor married hotel-chain heir Conrad Hilton, Jr. , in a highly publicized ceremony. The event was organized by MGM, and used as part of the publicity campaign for Taylor's next film, Vincente Minnelli's comedy Father of the Bride (1950), in which she appeared opposite Spencer Tracy and Joan Bennett as a bride preparing for her wedding. The film became a box-office success upon its release in June, grossing $6 million worldwide, and was followed by a successful sequel, Father's Little Dividend (1951), ten months later.