Mexican Hayride is a 1948 film starring the comedy team of Abbott and Costello. The film is based on Cole Porter's Broadway musical Mexican Hayride starring Bobby Clark. No songs from the stage musical were used in the film.

Plot

Joe Bascomb chases con man Harry Lambert to Mexico City, after Harry apparently swindled him (and some friends) in an oil stock scam back in the United States. Joe's ex-girlfriend, Mary has hired Harry as her agent, and is going by the name 'Montana', passing herself off as a toreador. When Joe encounters Harry at a bullring arena, he also sees Mary, who is in the ring. As part of 'Amigo Americana Week', she is about to toss her hat into the crowd where the lucky recipient will be proclaimed 'goodwill ambassador'. Mary is supposed to toss the hat to Gus Adamson, another con man whom Harry has arranged to be chosen, but Mary instead throws the hat in anger at Joe. It turns out that Joe, now the 'goodwill ambassador', is also being pursued by American authorities for partaking in the oil stock scam; he uses an alias, 'Humphrey Fish', while in Mexico.