Muss 'Em Up
Lobby card
Directed by	Charles Vidor Doran Cox (assistant)
Written by	Erwin Gelsey
Produced by	Pandro S. Berman
Starring	Preston Foster Margaret Callahan Alan Mowbray Ralph Morgan
Cinematography	J. Roy Hunt Joseph August
Edited by	Jack Hively
Music by	Roy Webb
Production company	RKO Radio Pictures
Distributed by	RKO Radio Pictures
Release dates	February 1, 1936 (1936-02-01) (Premiere-New York City)[1] February 14, 1936 (1936-02-14) (US)[1]
Running time	70 minutes
Country	United States
Language	English

Muss 'Em Up is a 1936 American mystery detective film directed by Charles Vidor from a screenplay by Erwin Gelsey. RKO Radio pictures premiered the film in New York City on February 1, 1936, with a nationwide opening on February 14. The film stars Preston Foster and Margaret Callahan, with a supporting cast which includes Alan Mowbray, Ralph Morgan, Big Boy Williams, and Maxie Rosenbloom.

Private detective and former police officer “Tip O’Neill” is hired by a wealthy aristocrat to solve the shooting of his dog. The intrigue continues, with kidnapping, police abuse, assault, and ransom as more characters are murdered, and betrayal within his own household leads to an unexpected conclusion.

• Preston Foster as Tippecanoe 'Tip'O'Neil
• Margaret Callahan as Amy Hutchins, Paul's secretary
• Alan Mowbray as Paul Harding
• Ralph Morgan as Jim Glenray, Paul's brother-in-law
• Guinn 'Big Boy' Williams as 'Red' Cable
• Maxie Rosenbloom as Snake, Spivali's henchman
• Molly Lamont as Nancy Harding
• John Carroll as Gene Leland, Corinne's fiancée
• Florine McKinney as Corinne, Paul's ward
• Robert Middlemass as Inspector Brock
• Noel Madison as Tony Spivali, Gambler
• Harold Huber as Maratti
• Clarence Muse as William, Paul's chauffeur
• Paul Porcasi as Luigi Turseniani, mob boss
• Ward Bond as a gangster
• John Adair as a gangster
• Willie Best as a janitor (uncredited)

• Muss 'Em Up at IMDb