Francis Joins the WACS is a 1954 American black-and-white comedy film from Universal-International, produced by Ted Richmond, directed by Arthur Lubin and starring Donald O'Connor, Julie Adams, ZaSu Pitts, Mamie Van Doren and Chill Wills in two roles, including that of the distinctive voice of Francis in voice-over.

[3] A computer error mistakenly assigns junior officer Peter Stirling to the Women's Army Corps (WAC).

Peter's old friend Francis, a talking mule, helps him through his various military and personal problems, including several familiar stays in the base's psychiatric ward.

The film is noteworthy for Chill Wills, the voice of Francis, appearing on screen as General Kaye and the mule, who very reluctantly talks to him in order to prove Peter is not crazy.

[5] The Variety review stated that "The boxoffice outlook is good, since the same type of screwball comedy that has characterized this series is put forth slickly in this one.