Russell Brand

Arthur

Helen Mirren

Hobson

Greta Gerwig

Naomi Quinn

Jennifer Garner

Susan Johnson

Geraldine James

Vivienne

Luis Guzmán

Bitterman

Nick Nolte

Burt Johnson

Peter Van Wagner

Naomi's Dad

Christina Jacquelyn Calph

Tiffany

John Hodgman

Peter, Candy Store Manager

Murphy Guyer

Officer Kaplan

Saul Stein

Officer #2

José Ramón Rosario

Employment Clerk

John Hodgman

Candy Store Manager

Scott Adsit

Gummy Bear Man

Robert Clohessy

Veteran Cop

Ed Herbstman

Rookie Cop

Jared Parker

Wedding Kid

Tom Toner

Wedding Priest

Richard Bekins

Chancellor

Matt Malloy

Spoon Guy

Nigel Barker

Photographer

Tuffy Questell

Tito

Sara Chase

Journalist #1

Ali Reza

Journalist #2

Charlie Hewson

Receptionist / Best Man

Peter Brouwer

Auctioneer

Stink Fisher

Foreman

Pascal Yen-Pfister

Maitre D'

Dylan Clark Marshall

Boy on Tour

Steve Rosen

Grand Central Waiter

Leslie Hendrix

Alice Johnson

George Feaster

James

Ed Jewett

Group Leader

Jennie Eisenhower

Maid of Honor

Sean Tarjyoto

Bookstore Clerk

Pamela Stewart

Librarian

Skai Jackson

Library Girl #1

Jackson Nicoll

Library Boy #1

Jamie Choi

Bridesmaid (uncredited)

Tatsumi Romano

Tour Girl (uncredited)