Gary Merrill on July 28, 1950. That same day, he married Bette Davis, his co-star from "All About Eve", and adopted her daughter Barbara from a previous marriage. He and Davis adopted two more children, Margo and Michael, but they had a bitter divorce in 1960. Often politically active, he campaigned in 1958 to elect the Democrat, Edmund Sixtus Muskie, as governor of Maine. Merrill also took part in the Selma to Montgomery marches in 1965 to promote Black voter registration. In response to U.S. President Lyndon B. Johnson's Vietnam War policy, he unsuccessfully sought nomination to the Maine legislature as an
Bette Davis film, "Lady for a Day"), based on a story by Damon Runyon. She accepted her next role, in the Grand Guignol horror film "What Ever Happened to Baby Jane?" (1962), after reading the script and believing it could appeal to the same audience that had recently made Alfred Hitchcock's "Psycho" (1960) a success. She negotiated a deal that would pay her 10% of the worldwide gross profits in addition to her salary. The film became one of the year's biggest successes. Davis and Joan Crawford played two aging sisters, former actresses forced by circumstance to share a decaying Hollywood mansion.