Liam James as Duncan

Steve Carell as Trent Ramsey

Toni Collette as Pam

AnnaSophia Robb as Susanna Thompson

Sam Rockwell as Owen

Allison Janney as Betty Thompson

Maya Rudolph as Caitlyn

Amanda Peet as Joan

Rob Corddry as Kip

Nat Faxon as Roddy

Jim Rash as Lewis

Zoe Levin as Steph

River Alexander as Peter Thompson

Adam Riegler as Niel

Jeremy Weaver as Jason

Robert Capron as Kyle

Rodney Lodge as Malcolm

Devon Werden as Laura

Ava Deluca-Verley as Katy

Jake Picking as Chad

Jeff Ryan as Charlie

Andria Blackman as Beautiful Woman

Aingea Venuto as Sunbathing Girl

Emily Petta as Teen's Mother