Jack Nicholson James R. 'Jimmy' Hoffa Danny DeVito Bobby Ciaro Armand Assante Carol D'Allesandro J. T. Walsh Frank Fitzsimmons John C. Reilly Pete Connelly Natalija Nogulich Jo Hoffa Kevin Crowley Reporter Robert Prosky Billy Flynn Kevin Anderson Robert F. Kennedy Frank Whaley Young Trucker in Diner John Judd Senate Policeman John P. Ryan Red Bennett Nicholas Pryor Hoffa's Attorney Paul Guilfoyle Ted Harmon Karen Young Young Woman at RTA Cliff Gorman Solly Stein Joe Greco Loading Foreman Anthony Cannata Organizer Valentino Cimo Assailant #1 Tom Finnegan Teamster President Louis Giambalvo RTA Representative Robert Maffia Reporter #2 Gerry Becker Business Negotiator Shirley Prestia Hoffa's Secretary Richard Schiff Government Attorney Steve Witting Eliot Cookson Peter Spellos Man in Crowd Gary Houston Government Agent in Bar Larry John Meyers Newsman John 'Cha Cha' Ciarcia D'Ally's Financial Advisor Tim Burton Corpse (uncredited) Thomas F. Evans Detroit Cop (uncredited) Jon Favreau Extra