"What About Bob?" is a 1991 American black comedy film directed by Frank Oz and starring Bill Murray and Richard Dreyfuss. The movie follows Bob Wiley, a mentally unstable patient who follows his egotistical psychotherapist Dr. Leo Marvin on vacation. When Bob befriends the other members of Leos family, the patients problems push the doctor over the edge. The top cast includes Bill Murray as Bob Wiley, Richard Dreyfuss as Dr. Leo Marvin, Julie Hagerty as Fay Marvin, Charlie Korsmo as Sigmund "Siggy" Marvin, and Kathryn Erbe as Anna Marvin. The movie was a critical and box office success, grossing $63.7 million in the US.