Tristram Shapeero Director Joel McHale Boyd Mitchler Actor Robin Williams Mitch Actor Lauren Graham Luann Mitchler Actor Clark Duke Nelson Actor Oliver Platt Hobo Santa Actor Wendi McLendon-Covey Shauna Actor Tim Heidecker Dave Actor Candice Bergen Donna Actor Phil Johnston Screenwriter Michael Flynn Executive Producer Anthony Russo Executive Producer Joe Russo Executive Producer Ben Nearn Producer Tom Rice Producer Jonathan Sadoff Original Music Giovani Lampassi Cinematographer Christian Kinnard Film Editing Juel Bestrop Casting Josh Einsohn Casting John Collins Production Design David Offner Art Director Fernando Valdes Art Director Kristen McGary Set Decoration Sara O'Donnell Costume Design