Billy Porter / Randy
Carmen Ejogo / Dr. Batiste
Donna Hanover / Debbie Carmichael
Merwin Mondesir / Glenn
Una Kay / Helen
Sonia Benezra / Aunt Sonya
Marcia Bennett / Nurse Stein
HoJo Rose / ER Doctor
Jane Wheeler / Karen
David Julian Hirsh / Barton
Marguerite Kinh / Mrs. Lee
Arthur Holden / Piano Player
Maurizio Terrazzano / Tom
Rachelle Lefevre / Holly
Erika Rosenbaum / Merry
Charles Rosenblum / Coffee Vendor
Victoria Sanchez / Young Mother
Scott Faulconbridge / Man in Front Row
Budd Mishkin / NY1 Reporter
Carmen Echeverria / Young Girl
Gianpaolo Venuta / Young Guy
Nicholas Haze / Waiter
Ruth Chiang / Nurse Woo
Kevin Ryder / Bartender
Andy Bradshaw / Security Guard #1
Robert Newton Brown / Security Guard #2
Bill Corday / Meek Man
Jennifer Seguin / Young Woman
Lindsay Owen Pierre / Friend
David Schaap / Man with Head Injury
Lynne Adams / Head ER Nurse
Kathleen Mackey / Heather
Donna Giaimo / Singing Nun of the Daughters of St. Paul
Fay Josephine Pele / Singing Nun of the Daughters of St. Paul
Bridget Charles Ellis / Singing Nun of the Daughters of St. Paul
Mary R.G. Grissom / Singing Nun of the Daughters of St. Paul
Kathryn J. Hermes / Singing Nun of the Daughters of St. Paul
Bernadette M. Reis / Singing Nun of the Daughters of St. Paul
Margaret Timothy Sato / Singing Nun of the Daughters of St. Paul
Patricia C. Shaules / Singing Nun of the Daughters of St. Paul
Nancy M. Usselmann / Singing Nun of the Daughters of St. Paul
Christina M. Wegendt / Singing Nun of the Daughters of St. Paul
Gabriella Palminteri / Girl in Red Coat
James Callaghan / Extra
Isabelle Champeau / Party Guest
Lucinda Davis / Nurse Gomez
Anthony Ferriso / Santa Kid #2
Loren Ferriso / Santa Kid
Francesco Giannini / Family member
Chantal Lonergan / Joy
Dante Palminteri / Boy in Hospital
Adrianne Richards / Nurse Kline
Derek Schnobb / Boy
Robin Williams / Charlie Boyd /  The Priest

Karolyn Grimes / Self - Interviewee /  Zuzu Bailey
Cary Grant / Dudley the Angel (archive footage)
David Niven / (archive footage)
Natalie Wood / (archive footage)
Edmund Gwenn / Kris Kringle (archive footage)
Deborah Raffin / Self - Interviewee
Trina Mitchum / Self - Interviewee
Robert Mitchum / (archive footage)
Gordon Gebert / Self - Interviewee
Janet Leigh / (archive footage)
Barbara Stanwyck / (archive footage)
Fred MacMurray / (archive footage)
Margaret Sullavan / (archive footage)
Margaret O'Brien / Self - Interviewee
Judy Garland / (archive footage)
Edward G. Robinson / (archive footage)
Katharine Hepburn / (archive footage)
Jean Shepherd / (voice) (archive sound)
Zack Ward / Self - Interviewee
Peter Billingsley / (archive footage)
Albert Finney / Ebenezer Scrooge (archive footage)
Reginald Owen / Ebenezer Scrooge (archive footage)
Donna Reed / Mary Bailey (archive footage)
George C. Scott / Ebenezer Scrooge (archive footage)
Alastair Sim / Ebenezer Scrooge (archive footage)
Henry Travers / Clarence the Angel (archive footage)

Major. / The Double R Club Singer
Millie Brady / Joan Collins
Chris Mason / Ronnie Hart
Stephen Thompson / Ronnie Bender
Sam Spruell / Jack McVitie
Taron Egerton / Mad Teddy Smith
Alex Ferns / McLean
Martin McCreadie / Eddie Richardson
Shane Attwooll / George Cornell
Richard Riddell / Mike Jobber
Huggy Leaver / Pig & Whistle Barman
Sam Hoare / Stefan De Faye
David Thewlis / Leslie Payne
Frankie Fitzgerald / Jack Dickson
Christopher Adamson / Philip Testa
Chazz Palminteri / Angelo Bruno
Alex Giannini / Tony Caponigro
Duffy / Timi Yuro
Samantha Pearl / Shirley Bassey
Mark Theodore / Sonny Liston