An Innocent Affair is a 1948 American comedy film directed by Lloyd Bacon and written by Lou Breslow and Joseph Hoffman. The film stars Fred MacMurray, Madeleine Carroll, Charles "Buddy" Rogers, Rita Johnson, Louise Allbritton and Alan Mowbray. It was released on October 15, 1948 by United Artists. In the United Kingdom, the film was released under the title Don't Trust Your Husband.

Frederick Martin MacMurray was an American actor. He appeared in more than one hundred films and a successful television series in a career that spanned nearly a half-century. His career as a major film leading man began in 1935, but his most renowned role was in Billy Wilder's film noir Double Indemnity. From 1959 to 1973, MacMurray appeared in numerous Disney films, including The Shaggy Dog, The Absent-Minded Professor, Follow Me, Boys!, and The Happiest Millionaire. He starred as Steve Douglas in the television series My Three Sons.