Megan

Keira Knightley

Annika

Chloë Grace Moretz

Allison

Ellie Kemper

Ed Burch

Jeff Garlin

Craig

Sam Rockwell

Misty

Kaitlyn Dever

Anthony

Mark Webber

Bethany

Gretchen Mol

Junior

Daniel Zovatto

Patrick

Dylan Arnold

Theo

Louis Hobson

Linda

Jodi Thelen

Savannah

Sara Coates

Danielle

Kirsten deLohr Helland

Matt

Eric Riedmann

Mrs. Halpsky

Amy Thone

Teen Savannah

Rocki DuCharme

Teen Allison

Sara Lynne Wright

Teen Megan

Larissa Schmitz

Teen Anthony

Phillip Abraham

Teen Danielle

Maura Lindsay

Wedding DJ

Basil Harris

Sophomore Girl #1

Zoe McLane

Music Kid

Jasmin Savoy Brown

Espresso Server

Joey Ally

Airport Gate Agent

Bhama Roget

Bartender

Omar Silva

Junior Bridesmaid #1

Rachelle Henry

Dan (uncredited)

Kyle Love

Joanne

Mari Nelson

High School Girl

Hannah Horton

Prom DJ

Sean Nelson

Teen Allison

Sarah Lynne Wright

Junior Bridesmaid #2

Eliza Brown

Groomsman #1

Ernie Joseph

Groomsman #2

Rashaan Freeman

Minister

Kevin Seal

Sophomore Girl #3

Heidi Bove

Parker

Moses Yim

Nancy

Susan M. Carr

Partygoer

Bryan Gregory Sevener

Some Guy

Dylan Smith

Officer #2

Michael Shin

Wedding Guest

Steve Snoey

Officer

Tony Doupe

Young Officer

Aaron Washington

Wedding Guest

Amey Rene Morris

Wedding Couple - Bride

Tessa Marie Archer

Wedding Couple - Groom

Simon Hamlin