Dick Van Dyke as Self

Tichina Arnold as Self - Performer

Beth Behrs as Self - Performer

JoJo Siwa as Self - Performer

Jason Alexander as Self - Performer

'Weird Al' Yankovic as Self - Performer

Amanda Kloots as Self - Performer

Skylar Astin as Self - Performer

Amber Riley as Self - Performer

Rita Ora as Self - Performer

Rufus Wainwright as Self - Performer

Julie Andrews as Self

Lin-Manuel Miranda as Self

Judd Apatow as Self

David Archuleta as Self

Mel Brooks as Self

Carol Burnett as Self

Cedric the Entertainer as Self

Stephen Colbert as Self

Derek Hough as Self

David Copperfield as Self

Darren Criss as Self

Ted Danson as Self

Roma Downey as Self

Brad Garrett as Self

Mark Hamill as Self

Jenny McCarthy-Wahlberg as Self

Tony Hawk as Self

Ken Jeong as Self

John Lithgow as Self

Rob Reiner as Self

Craig Robinson as Self

Jane Seymour as Self

William Shatner as Self

Martin Short as Self

Harry Shum Jr. as Self

Mary Steenburgen as Self

Stanley Tucci as Self