Mister Roberts is a 1946 novel by Thomas Heggen, based on his experiences in the South West Pacific theatre during World War II. Several characters, including the eponymous Mister Roberts, were based on real people. Lieutenant Roberts defends his crew against the petty tyranny of the ship's commanding officer, while submitting transfer requests on a daily basis. Nearly all action takes place on a US Navy auxiliary cargo ship, the USS Reluctant, which sails, as written in the 1948 play adapted from the novel, "from Apathy to Tedium, with occasional side trips to Monotony and Ennui." Roberts eventually wins his freedom from the “bucket” and assignment to a destroyer, with tragic consequences.

Mister Roberts is a 1948 play based on the 1946 Thomas Heggen novel of the same name.