Sam Wood	...	(Director)
Robert Pirosh, George Seaton	...	(Writer)
Groucho Marx	...	Dr. Hugo Z. Hackenbush
Chico Marx	...	Tony
Harpo Marx	...	Stuffy
Allan Jones	...	Gil Stewart
Maureen O'Sullivan	...	Judy Standish
Margaret Dumont	...	Emily Upjohn
Leonard Ceeley	...	Whitmore
Douglass Dumbrille	...	J.D. Morgan
Esther Muir	...	Flo Marlowe
Sig Ruman	...	Dr. Leopold X. Steinberg (as Sig Rumann)
Robert Middlemass	...	Sheriff
Vivien Fay	...	Speciality Dancer (as Vivian Fay & Her Ballet)
Ivie Anderson	...	Specialty Singer
The Crinoline Choir	...	Themselves

Comments: Three Great Laff Stars ! . . . more gags and gals . . . more songs and dances !

Summary: "A Day at the Races" is the Marx Brothers at their commercial and popular peak, working with a top Hollywood director (Sam Wood of "The Pride of the Yankees"), supported with a healthy screen budget paying for such extras as a blue-tinted ballet sequence, love songs from crooner Allan Jones and decorative sets. But the brothers are also at the top of their game in terms of their own comic material and timing. The story finds Groucho, Chico and Harpo helping out at a sanatorium, where their longtime foil in the movies, Margaret Dumont, is the leading patient. The film has some of the trio's funniest and most memorable bits and a dazzling horserace at the climax. Not quite as good as its predecessor, "A Night at the Opera", this is still a highlight in the Marxian filmography.--"Tom Keogh, Amazon.com"