Suggestions by @aahp

Suzanne Todd

as Executive Producer in Deck the Halls

Dan Mazer

as Assistant Director in Deck the Halls

Danny DeVito & Matthew Broderick

as Director in Deck the Halls

James Marsden

as Gustave in Deck the Halls

Josh Gad

as Wallace in Deck the Halls

Lindsay Lohan

as Gerta in Deck the Halls

Rhea Perlman

as Mrs Ryor in Deck the Halls

Cary Christopher

as Carter Finch in Deck the Halls

Ruby Rose Turner

as Ashley/Emily Hall in Deck the Halls

Violet McGraw

as Madison Finch in Deck the Halls

Mila Kunis

as Kelly Finch in Deck the Halls

Kristen Bell

as Tia Hall in Deck the Halls

Jerry Trainor

as Steve Finch in Deck the Halls

Kevin Hart

as Buddy Hall in Deck the Halls

Jon Becker

as Soundtrack Composer in The Gachatrix

AJ McLean

as Composer in The Gachatrix

RosyClozy

as Writer in The Gachatrix

James Gunn

as Producer in The Gachatrix

Seth Rogen & Evan Goldberg

as Executive Producer in The Gachatrix

Robert Downey Jr.

as Assistant Director in The Gachatrix