Currently available on 2 streaming services.

A Very Sunny Christmas streaming: where to watch online?

You are able to buy "A Very Sunny Christmas" on Amazon Video, Fandango At Home as download.

Cast

Charlie Day
Charlie Kelly
Glenn Howerton
Dennis Reynolds
Rob McElhenney
Ronald "Mac" McDonald
Kaitlin Olson
Deandra "Sweet Dee" Reynolds
Danny DeVito
Frank Reynolds
David Huddleston
Eugene Hamilton
Gregory Scott Cummins
Luther McDonald
Sandy Martin
Mrs. McDonald
Lynne Marie Stewart
Bonnie Kelly
Pablo Schreiber
Ricky Falcone
Ryan Michelle Bathe
Woman Office Worker
Mike Beaver
Man Office Worker
Derek Waters
Toy Store Clerk
Mark Povinelli
Tiny
Preston Bailey
Young Mac
Charlie Carter
Young Dennis
Harley Graham
Young Dee
Robbie Tucker
Young Charlie
Timothy E. Goodwin
Christmas Dad
Donovan Scott
Santa Claus in Mall
Karly Rothenberg
Another Mom
Marc Anthony Samuel
Raisin #1 (voice)
Gary Anthony Williams
Snowman (voice) / Raisin #2 (voice)
Michael Yurchak
Christmas Elf (voice)
Christopher Lloyd
Santa Claus John #2 (uncredited)