Gabriel LaBelle as Lorne Michaels

Rachel Sennott as Rosie Shuster

Cory Michael Smith as Chevy Chase

Ella Hunt as Gilda Radner

Dylan O'Brien as Dan Aykroyd

Emily Fairn as Laraine Newman

Matt Wood as John Belushi

Lamorne Morris as Garrett Morris

Kim Matula as Jane Curtin

Tommy Dewey as Michael O'Donoghue

Cooper Hoffman as Dick Ebersol

Nicholas Braun as Andy Kaufman / Jim Henson

Andrew Barth Feldman as Neil Levy

Finn Wolfhard as NBC Page

Willem Dafoe as David Tebet

Stephen Badalamenti as Lobby Security Guard

Ellen Boscov as Mrs. Kaufman

John Dinello as Shop Steward

J.K. Simmons as Milton Berle

Presley Coley as Barbara Gallagher

Kaia Gerber as Jacqueline Carlin

Catherine Curtin as Joan Carbunkle

Nicholas Podany as Billy Crystal

Corinne Britti as Valri Bromfield

Justin Matthew Smith as Joe Dicso

Matthew Rhys as George Carlin

Taylor Gray as Al Franken

Leander Suleiman as Anne Beatts

Mcabe Gregg as Tom Davis

Kirsty Woodward as Audrey Dickman

Jon Batiste as Billy Preston

Naomi McPherson as Janis Ian

Brian Welch as Don Pardo

Paul Rust as Paul Shaffer

Josh Brener as Alan Zweibel

Tracy Letts as Herb Sargent

Brad Garrett as Borscht Belt Comedian

Rowan Joseph as Jim Fox

Billy Bryk as Carl

Abraham Hsu as Leo Yoshimura

Parker Wierling as Tom Schiller

James Logan as Stew Sorrentino

Robert Wuhl as Dave Wilson

Drew Scheid as Bob Pook

Martin Garner as Video Engineer

Jeff Pope as Scotty Schachter

Jef Holbrook as Editor

Jacob Berger as Loading Dock Security Guard

Casey Nicholas Price as Affiliate John

Cassidy Alexandra Kahler as Polaroid Rep

Colby West as Radio Announcer

Peter Dawson as Elevator Attendant

Mike Platarote Jr. as Card Trick Stage Hand

Rob Barnes as Stage Hand

Grace Barlow as Edie Baskin

Alia Guidry as Wardrobe Assistant

Christian A. Jenkins as Spray Paint Constumer

Raiford Jackson as 8H Security Guard

Aidan Patrick Griffin as Intern

Mark Cyr as Technical Director

William C. Tate as Wallie

John Ross as Crane Op

Brandon Niederauer as Billy Preston band

Alvin Ford Jr. as Billy Preston band

Cory Henry as Billy Preston band

Nicholas Clark as Billy Preston band

Max Townsley as Billy Preston band

Alexander Glyn Bennett as Young Reporter

Robert Entous as Affiliate John

Caroline Raad as Balloon Lady

Zane Shaw as Rumpus Rambler

Carter Colvin as Rumpus Rambler

Tristan McGlauchlen as Rumpus Rambler

Arlo Lachenmeyer as Rumpus Rambler

John Mayo as Tap Dancer

Lauren Shelfo as Showgirl

Dalton Suskie as Showgirl

McKinley Horn as Showgirl

Anna East as Showgirl

Rionna Luck as Showgirl

Jamie Day as Grizzly Lighting Director

Ted Williams as Moose

Jeff Witzke as Johnny Carson (voice)