Zachary Levi as Scott LeRette

Gavin Warren as Logan LeRette

Jacob Laval as Austin LeRette

Amy Acker as Lori

Meghann Fahy as Teresa

Bruce Davis as Autism Specialist

Kellen Martelli as Austin LeRette (age 5)

Roy Jackson Miller as Austin LeRette (age 2)

Elle Adler as 2-Month-Old Austin

Patricia Heaton as Marci

Drew Powell as Joe

Todd Terry as Dick

Peter Facinelli as Preacher Rick

Liza Marie Gonzalez as Delivery Doctor

Arianne Martin as Nurse

Kurt Yue as OI Doctor

Eric Starkey as Justice

Pilot Bunch as Tyler

Kelsey Griswold as Concerned Nurse

Tyrone Betters as Miles

Katie O'Dell as Teacher

Jason Daniel as Psych War Doctor

Eleanor Threatt as Principal Ilene

William Ohl as Elderly Man

Kevin Downes as Lyle

Addison Hambright as Nice Girl

Erin Elizabeth Cook as Orderly

Michael Anthony Page as Man in Line

James Van Alstine as Passing Man

Alex Atkinson as Partygoer (uncredited)

Barbie Bailey as Teacher (uncredited)

Avery Baker as Restaurant Patron (uncredited)

Ashtyn Barlow Nguyen as Cheerleader / Student / Trick or Treater (uncredited)

Lisandro Boccacci as AA Member (uncredited)

Myles Currin-Moore as Trumpet Player (uncredited)

Katie Fairbanks as Pep Band Member (uncredited)

Lisa Fenimore as Nurse (uncredited)

Michael Gibbons as Campout Dad (uncredited)

Lena Harmon as Doctor (uncredited)

Katy Hayes as Country Club Dancer (uncredited)

Jim Henry as Mr. Hollingsworth (uncredited)

Kenda Henthorn as Restaurant Patron / Arcade Patron (uncredited)

Erin Herring as Waitress (uncredited)

Andrew Hooks as Trick or Treater - Parent (uncredited)

Tristan Hutchinson as Waiter (uncredited)

Emily Jewell as Student (uncredited)

Courtney Johnson as AA Leader (uncredited)

Riley Kahn as Cheerleader & Student (uncredited)

Scott Lancaster as Wedding Reception Guest (uncredited)

Jay North as Burger Patron (uncredited)

Max Purget as Trick or Treater (uncredited)

Stephen Radley III as Teacher (uncredited)

Michelle Sander as Orderly (uncredited)

Barbara Sandlin as Burger Joint Patron (uncredited)

Rita Scranton as Country Club Patron (uncredited)

Melissa Sellers-Durham as Patient (uncredited)

Alexandra Swanbeck as Nurse (uncredited)

Joel Telford as Bully Friend (uncredited)

Brittany Walker as Church Goer (uncredited)

Mattie Ward as AA Member (uncredited)

April Warren as AA Member (uncredited)

Chuck Whetstone as Hospital Visitor (uncredited)

James Wirt as Restaurant Patron (uncredited)

Kevin Yap as Waiter (uncredited)

Kurt Yue as IO Doctor