Miles Teller as Andrew

J.K. Simmons as Fletcher

Paul Reiser as Jim

Melissa Benoist as Nicole

Austin Stowell as Ryan

Nate Lang as Carl

Chris Mulkey as Uncle Frank

Damon Gupton as Mr. Kramer

Suanne Spoke as Aunt Emma

Max Kasch as Dorm Neighbor

Charlie Ian as Dustin

Jayson Blair as Travis

Kofi Siriboe as Bassist (Nassau)

Kavita Patil as Assistant - Sophie

C.J. Vana as Metz

Tarik Lowe as Pianist (Studio Band)

Tyler Kimball as Saxophonist #2 (Studio Band)

Rogelio Douglas Jr. as Trumpeter #1 (Studio Band)

Adrian Burks as Trumpeter #2 (Studio Band)

Calvin C. Winbush as Saxophonist (Studio Band)

Joseph Bruno as Technician (Overbrook) - Mike

Michael D. Cohen as Stage Hand (Overbrook)

Jocelyn Ayanna as Passerby (Bus Station)

Keenan Henson as Truck Driver

Janet Hoskins as Passerby (Dunellen)

April Grace as Rachel Bornholdt

Clifton 'Fou Fou' Eddie as Drummer (Quartet)

Marcus Henderson as Bassist (JVC)

Tony Baker as Stage Hand (Carnegie Hall)

Henry G. Sanders as Red Henderson

Sam Campisi as Andrew (8 years old)

Jimmie Kirkpatrick as Nassau Trumpeter #2

Keenan Allen as Studio Core Member #1

Ayinde Vaughan as Studio Core Member #2

Shai Golan as Studio Core Member #3

Yancey Wells as Studio Core Member #4

Candace Roberge as Student #1

Krista Kilber as Student #2

Joseph Oliveira as Bartender (uncredited)