Saoirse Ronan Christine "Lady Bird" McPherson Laurie Metcalf Marion McPherson Tracy Letts Larry McPherson Lucas Hedges Danny O'Neill Timothée Chalamet Kyle Sheible Beanie Feldstein Julie Steffans Lois Smith Sister Sarah Joan Stephen Henderson Father Leviatch Odeya Rush Jenna Walton Jordan Rodrigues Miguel McPherson Marielle Scott Shelly Yuhan John Karna Greg Anrue Jake McDorman Mr. Bruno Bayne Gibby Casey Kelly Laura Marano Diana Greenway Marietta DePrima Miss Patty Daniel Zovatto Jonah Ruiz Kristen Cloke Ms. Steffans Andy Buckley Uncle Matthew Kathryn Newton Darlene Bell Myra Turley Sister Gina Bob Stephenson Father Walter Abhimanyu Katyal Friendly Banker Chris Witaske Business Jock Danielle Macdonald Another Young Lady