Will Ferrell as Reggie (voice)

Jamie Foxx as Bug (voice)

Isla Fisher as Maggie (voice)

Randall Park as Hunter (voice)

Will Forte as Doug

Brett Gelman as Willy

Rob Riggle as Rolf (voice)

Josh Gad as Gus (voice)

Sofía Vergara as Dolores the Couch (voice)

Jamie Demetriou as Chester (voice)

Greta Lee as Bella (voice)

Jimmy Tatro as Finn the Rottweiler (voice)

Harvey Guillén as Shitstain (voice)

Jack De Sanz as Munchkin (voice)

Phil Morris as Bubsy (voice)

David Herman as Underbite Pound Dog (voice)

Jaquita Ta'le as Afghan Hound (voice)

Charity Cervantes as Jenna

Jade Fernandez as Doug's Girlfriend

Mikayla Rousseau as Riley

Mike Dolphy as Riley's Dad

Aven Lotz as Emma

Hannah Alline as Emma’s Mom

Garrett Hines as Emma’s Dad

Dan Perrault as Dr. Hagen

Dennis Quaid as Birdwatcher

Keith Brooks as Steve

Hedy Nasser as Carly

Dexter Masland as James

Gabriella Garcia as Teen Girl

Andrew Nicolas Starr as Teenage Boy

Andrea Laing as Jenna's Friend

Alexandra Ficken as Jenna's Friend

Ryan Dinning as Mailman

Stephanie Dunnam as Woman Gardening

Deadra Moore as Old Woman in Park

Alonzo Ward as Old Man in Park

AJ Bernard as Liam

Tinashe Kajese as Cathy (uncredited)