All Cast
J. Michael Finley
Bart Millard
Dennis Quaid
Arthur
Cloris Leachman
Memaw
Brody Rose
Young Bart
Madeline Carroll
Shannon
Gianna Simone
Dr. Avondale
Kevin Downes
Singleton
Jason Burkey
Mike
Rhoda Griffis
Jen
Tanya Clarke
Adele
Nicole DuPort
Amy Grant
Priscilla C. Shirer
Mrs. Fincher
Taegen Burns
Young Shannon
Trace Adkins
Brickell
Mark Furze
Nathan
Randy McDowell
Jim
Cole Marcus
Robbie
Alexander Dominguez
Kent
J.R. Cacia
Rusty
Mark Robert Ellis
Coach
Samuel Sadovnik
Young Kent
Kerry McCormick
Nurse
David Norona
Bill Layton
Bill 'Bubba' Bussey Jr.
Radio DJ #2
Jake B. Miller
Michael W. Smith
Ed Spinelli
Coach (uncredited)