Saoirse Ronan
Role: Lady Bird McPherson
Laurie Metcalf
Role: Marion McPherson
Tracy Letts
Role: Larry McPherson
Lucas Hedges
Role: Danny O'Neill
Timothée Chalamet
Role: Kyle Sheible
Beanie Feldstein
Role: Julie Steffans
Lois Smith
Role: Sister Sarah Joan
Stephen McKinley Henderson
Role: Father Leviatch
Odeya Rush
Role: Jenna Walton
Jordan Rodrigues
Role: Miguel McPherson
Marielle Scott
Role: Shelly Yuhan
John Karna
Role: Greg Anrue
Jake McDorman
Role: Mr. Bruno
Bayne Gibby
Role: Casey Kelly
Laura Marano
Role: Diana Greenway
Marietta DePrima
Role: Miss Patty
Daniel Zovatto
Role: Jonah Ruiz
Kristen Cloke
Role: Ms. Steffans
Andy Buckley
Role: Uncle Matthew
Paul Keller
Role: Parish Priest
Kathryn Newton
Role: Darlene Bell
Myra Turley
Role: Sister Gina
Bob Stephenson
Role: Father Walter
Abhimanyu Katyal
Role: Friendly Banker
Chris Witaske
Role: Business Jock
Ben Konigsberg
Role: David From College
Gurpreet Gill
Role: Convenience Store Clerk
Richard Jin Namkung
Role: Cool Coffee Manager
Joan Patricia O'Neil
Role: Danny's Grandmother
Robert Figueroa
Role: Cast Removal Doctor
Carla Valentine
Role: Guidance Counselor
Roman Arabia
Role: Luis Cruz
Monique Edwards
Role: NYC Nurse
Matthew Maher
Role: NYC Man on Street
Anita Kalathara
Role: Prom Chairwoman
Debra Miller
Role: Saleswoman Joyce
Georgia Leva
Role: Senior Class Candidate
Derek Butler
Role: "Merrily We Roll Along" Performer
London Thor
Role: "Merrily We Roll Along" Performer
Shaelan O'Connor
Role: "Merrily We Roll Along" Performer
Christina Offley
Role: "Merrily We Roll Along" Performer
Sabrina Schloss
Role: "Merrily We Roll Along" Performer
Connor Mickiewicz
Role: "Merrily We Roll Along" Performer
Erik Daniells
Role: "Merrily We Roll Along" Performer
Cynthia Cales
Role: Immaculate Heart of Mary Teacher
Giselle Grams
Role: Immaculate Heart of Mary Teacher
Ithamar Enriquez
Role: Driving Instructor
Luisa Lee
Role: Young Lady
Danielle Macdonald
Role: Another Young Lady
Adam Brock
Role: Band Lead Singer
Bonnie Jean Shelton
Role: Fab 40s Realtor
Rebecca Light
Role: Mr. Bruno's Wife
Janet Song
Role: Administrator (uncredited)
