was an American actor, dramatist and screenwriter most noted for his collaborations with his partner and wife Frances Goodrich.
Hackett acted in many films, including Anne of Green Gables (1919). His Broadway credits as a performer include Mr. and Mrs. North (1941), Up Pops the Devil (1930), Mirrors (1928), Off-Key (1927), Twelve Miles Out (1925), The Nervous Wreck (1923), Up the Ladder (1922), Just a Woman (1914) and The Happy Marriage (1909). His Broadway credits as a writer include The Diary of Anne Frank (1955 and 1997), The Great Big Doorstep (1942), Bridal Wise (1932), Everybody's Welcome (1931) and Up Pops the Devil (1930).
For the summer of 1928, Hackett joined the summer stock cast at Denver's Elitch Theatre. Fellow cast member, Frances Goodrich, showed him a script she had written, entitled Such A Lady, and they rewrote it together. This was the beginning of their collaboration.
Soon after marrying screenwriter Frances Goodrich, the couple moved to Hollywood in the late 1920s to write the screenplay for their stage success Up Pops the Devil for Paramount Pictures. In 1933, they signed a contract with MGM and remained with the studio until 1939. Among their earliest assignments was writing the screenplay for The Thin Man (1934). They were encouraged by director W. S. Van Dyke to use the writing of Dashiell Hammett as a basis only and to concentrate on providing witty exchanges for the principal characters, Nick and Nora Charles (played by William Powell and Myrna Loy). The resulting film became one of the year's major hits, and the script, considered to show a modern relationship in a realistic manner for the first time, was considered groundbreaking, although it preceded enforcement of the Motion Picture Production Code.
