David Letterman

Self - Host

Paul Shaffer

Self -Musical Director

Alan Kalter

Self - Announcer (voice)

Bill Wendell

Self - Announcer (voice)

Edd Hall

Voiceover Announcer (voice)

Scarlett Johansson

Self

Emily Blunt

Herself

Maggie Gyllenhaal

Self

Neil Young

Self

Harry Styles

Himself

Louis Tomlinson

Himself

Liam Payne

Himself

Zayn Malik

Himself

Niall Horan

Himself

Prince

Kirk Johnson

Rhonda Smith

Morris Hayes

Kat Dyson

Eric Leeds

Al Pacino

Himself

Miles Kath

Young Lettermen

Jessica Jung

Herself

Yoona

Herself

Taeyeon

Herself

Kwon Yu-ri

Herself

Hyoyeon

Herself

Sunny

Herself

Tiffany Young

Herself

Choi Soo-young

Herself

Seohyun

Herself

Susan Sarandon

Self

Whitney Cummings

Self

Angel Olsen

Self

Julio Iglesias

Self - Musical Guest

Gary Sinise

Self - Guest

Ricki Lake

Self - Guest

Cody Arens

Self

Alicia Keys

Self

Bruce Willis

Self

Julianna Margulies

Self - Guest

Eric Ripert

Self - Guest

Joe Seaward

Self - Musical Guest

Drew MacFarlane

Self - Musical Guest

Dave Bayley

Self - Musical Guest

Edmund Irwin-Singer

Self - Musical Guest

Lisa Howard

Lt. Genevieve Marshall

Tom Mison

Self - Guest

Taylor Swift

Self - Musical Guest

John Grant

Self

Nia Sanchez

Self

Christopher Walken

Self

Janelle Monáe

Self

Tatiana Maslany

Self

Regis Philbin

Self

Paul Morrissey

Self

Olivia Wilde

Self

Shep Gordon

Self

Dana Carvey

Self

Ellie Kemper

Self

Sam Smith

Self

Paul Rudd

Self

Jeff Altman

Self

Adam Levine

Self

Gen. Frank J. Grass

Self

Melissa McCarthy

Self

Rachelle Lefevre

Self

Lady Gaga

Self - Guest

Eric Stonestreet

Self - Guest

Justin Hayward-Young

Self - Musical Guest

Árni Árnason

Self - Musical Guest

Timothy Lanham

Self - Musical Guest

Yoann Intonti

Self - Musical Guest