Marty Supreme

Timothée Chalamet Marty Mauser

Gwyneth Paltrow Kay Stone

Odessa A'zion Rachel Mizler

Kevin O'Leary Milton Rockwell

Tyler, The Creator Wally

Fran Drescher Rebecca Mauser

Abel Ferrara Ezra Mishkin

Emory Cohen Ira Mizler

Géza Röhrig Béla Kletzki

Koto Kawaguchi Koto Endo

Larry Sloman Murray Norkin

Luke Manley Dion Galanis

Pico Iyer Ram Sethi

Mariann Tepedino Mariann

Ralph Colucci Lloyd

Devorah Shubowitz Norkin Customer

George Gervin Lawrence

Marinel Tinnirello Not Marty's Messenger

Sandra Bernhard Judy

John Catsimatidis Christopher Galanis

Nick Waplington Wembley Photographer

Nikhil Kumar Amit Vishwakarma

Keith Kirkwood Wembley Round 1 Umpire

Conn Horgan Angry British Bailey Fan

Joshua Bennett Ted Bailey

Timo Boll Vladimir Sebek

Mahadeo Shivraj Wembley Round 3 Umpire

John Keating Daily Mail Reporter

Ed Malone The Sun Reporter

Roddy O'Hehir The Star Reporter

Michael Cummings Irish Times Reporter

Harvey Shield Ritz Maître D'

Diego Schaaf Wembley Finals Umpire

Sho Miyazaki Japanese Coach

Andy Kai Nagashima Japanese Team Member

Dennis Creaghan Wembley Announcer

Francis Dumaurier French Maître D'

Kemba Walker Globetrotter

Tracy McGrady Globetrotter

Musto Pelinkovicci Greasy MC

Marius Tanase Coach Abe

Philippe Petit Brussels MC

Donato P. Daddario Officer Sal

Frankie Carbone Officer Frank

Lizzi Bougatsos Pet Store Customer Mom

Lucas Z. Heinrich Pet Store Customer Son

Johnny Engle Bruised Man

Jimmy Lindquist Halsey Desk Clerk

Todd Vulpio Pissed Off Neighbor at Halsey

Johnny Zito Halsey Worker / Male Voice (voice)

Stephen Dachtera Halsey Worker

Brian Marks Paramedic

Kevin Eccleston Paramedic

Richard Schlossbach Fox's Employee

Emilio El Kilani Boyd

Isaac Simon Roger

Cody Kostro Board Man

George J. Katsiavos Overalls

Levon Hawke Christian

Spenser Granese Clark

Hailey Benton Gates Trish

Patrick Wiki Morales Lawrence's Dirtbag

Ted Williams Ted

Alison Bartlett Rockwell Receptionist Voice (voice)

Fred Hechinger Troy

David Mamet Director Glenn Nordmann

Jake Braff Playwright

Bill Buell Henry the Suitor

Naomi Fry Assistant to Kay Stone

Paul Grimstad Production Manager

Barry Daniels Hotel Edison Custodian

Roman Persits Pawn Shop Leon

Garrett Hermann Gas Station Attendant

Penn Jillette Hoff

Linda Malamy Ira's Grandmother

Mitchell Wenig Mitch

Ronald Bronstein Blarney Stone Phone Voice (voice)

Edward Puydak Blarney Stone Bartender

Hector Diaz Park Hero

Isaac Mizrahi Merle

Kevin Loreque Fred Astaire

Joseph Cappiello Patrolman Cap

Joseph Jankauskas Patrolman Joey

Joris Stuyck Gloomy Rockwell Friend

Dante Fiallo Partygoer

Nancy Shankman Kay's Mom

Chris Nelson Milton's Friend

Eric Rampulla Milton's Friend

Randy Credico Milton's Friend

Bob Rubin Robert

Michael A. Sollecito Reuben

Cheryl Flowers-Briggs E.R. Nurse

Rory Gevis E.R. Nurse

Mia Humberd-Hilf Flight Attendant

Brian Sexton Rockwell Executive

Rick Garlick Rockwell Executive

Shingo Aiba Haneda Ramp Agent

Yasu Suzuki Japanese Rockwell Executive

Tatsuo Ichikawa Haneda Greeter

Mark Okita Japanese MC

Joe Matsumura Japanese Show Worker & Translator

Rei Ogaki Japanese Challenger #1

Anna Melody Japanese Usher

Ryuku Kina Ueno Ball Boy

Jota Ito Japanese Coach from JTTA

Hideyuki Yamashiro Japanese Show Worker

Tony Crosbie IATT Representative

Mahmoud Osfour IATT Representative

Kojun Natsu IATT Japanese Peer

Sadaharu Matsushita IATT Japanese Peer

Gao Ogawa IATT Japanese Peer

Tomoki Urabe Japanese Challenger #2

Charles Glover American General

Etsuko Enami Japanese Scorekeeper

Koji Oribe Japanese Ping Pong Umpire

Johnnie Yamamoto Man in Ueno Crowd

Nick Wood Officer

Susan Lazarus Bellevue Phone Operator

Rae Maddren Bellevue Maternity Reception

Carolyn Gershenson Newborn Nursery Nurse

Robert Pattinson British Open Semifinals Commentator (voice) (uncredited)

Veronica Hein Usher (uncredited)