Earthworm Tractors is a 1936 American film directed by Ray Enright and starring Joe E. Brown and June Travis. The film is also known as A Natural Born Salesman in the United Kingdom.

The film is based on characters created by William Hazlett Upson in a series of stories that appeared in The Saturday Evening Post. The series featured Alexander Botts, a natural-born salesman, and the Earthworm Tractor Company, and was inspired in part by Upson’s actual work experience with the Caterpillar Tractor Company.

Plot
In this slapstick romantic comedy, Alexander Botts is egged on by his sweetheart Sally to do great things, so he writes a letter to the Earthworm Tractor Company, and is hired as a salesman. He gets fired more than once, but is rehired by getting orders. He falls in love with Mabel, daughter of cranky Sam. Eventually, he proves a super salesman by selling many tractors to Sam, and wins Mabel’s love.

Cast
Joe E. Brown as Alexander Botts
June Travis as Mabel Johnson
Guy Kibbee as Sam Johnson
Dick Foran as Emmet McManus
Carol Hughes as Sally Blair
Gene Lockhart as George Healey
Olin Howland as Mr. Blair
Joseph Crehan as Mr. Henderson
Charles C. Wilson as H.J. Russell
William B. Davidson as Mr. Jackson
Irving Bacon as Taxicab Driver
Stuart Holmes as The Doctor
Frederick Schmitt as tractor driving stunt double for Joe E. Brown