Arthur

Russell Brand

Hobson

Helen Mirren

Naomi Quinn

Greta Gerwig

Susan Johnson

Jennifer Garner

Bitterman

Luis Guzmán

Vivienne

Geraldine James

Burt Johnson

Nick Nolte

Naomi's Dad

Peter Van Wagner

Tiffany

Christina Calph

Employment Clerk

José Ramón Rosario

Officer Kaplan

Murphy Guyer

Peter, Candy Store Manager

John Hodgman

Gummy Bear Man

Scott Adsit

Boxing Trainer

Evander Holyfield

Officer #2

Saul Stein

Veteran Cop

Robert Clohessy

Rookie Cop

Ed Herbstman

Wedding Kid

Jared Parker

Wedding Priest

Tom Toner

Chancellor

Richard Bekins

Spoon Guy

Matt Malloy

Photographer

Nigel Barker

Tito

Tuffy Questell

Journalist #1

Sara Chase

Journalist #2

Ali Reza Farahnakian

Journalist #3

Kimberly Pauley

Journalist #2

Ali Reza

College Student

Brian McElhaney

Receptionist / Best Man

Charlie Hewson

Auctioneer

Peter Brouwer

Foreman

Stink Fisher

Kissed Woman

Debbie Lee Jones

Maitre D'

Pascal Yen-Pfister

Boy on Tour

Dylan Clark Marshall

Grand Central Waiter

Steve Rosen

Alice Johnson

Leslie Hendrix

James

George Feaster

Group Leader

Ed Jewett

Choreographer

John Carrafa

Maid of Honor

Jennie Eisenhower

Bookstore Clerk

Sean Tarjyoto

Bookstore Clerk

Sean G. Tarjoto

Librarian

Pamela Stewart

Librarian

Pamela Holden Stewart

Library Girl #1

Skai Jackson

Library Girl #2

Tori Feinstein

Library Boy #1

Jackson Nicoll

Susan's Bridesmaid (uncredited)

Devin Almonte

Library Boy #2

Caden Draper

Bridesmaid (uncredited)

Jamie Choi

Library Boy #3

Jase Draper

Tour Girl (uncredited)

Tatsumi Romano

Clerk (uncredited)

Chelsey Donn