The series nine champion triumphed as he returned to the ballroom along with five other former contestants, for the festive edition of the hit BBC show.
Harry Judd and Joanna Clifton are the 'Strictly' Christmas champs
The McFly drummer and his partner Joanne Clifton lifted the Silver Star trophy after picking up a perfect 40 from judges Craig Revel Horwood, Darcey Bussell, Len Goodman and Bruno Tonioli, for their American Smooth to ‘Baby, It’s Cold Outside’.
However, they had stiff competition from series six winner Tom Chambers and his partner Oti Mabuse, whose Charleston to ‘Santa Claus Is Comin’ To Town’ also scored full marks.
"I had the most amazing time and I just want to dedicate this to Joanne who has been an incredible teacher and an incredible dancer. Thank you and Happy Christmas!”
A host of ex contestants returned to 'Strictly' for the festive special
Joanne added: “It feels amazing and I am so overwhelmed. Harry is an absolute natural and performed amazingly on the Christmas special.
“I want to say a massive thank you to him for being such a great dancer, partner, student and friend – he has made this experience such great fun for me. I am glad he can take home the Silver Star trophy and show his baby when it is born in January!”
Other stars who also returned for the show included 2013 champ Abbey Clancy, whose Waltz with Brendan Cole to ‘When I Fall in Love’ scored 39, and series six finalist Lisa Snowdon, whose Quickstep with Pasha Kovalev to ‘Let it Snow’ earned them a respectable 37.
Abbey Clancy's Waltz scored 39 out of 40
Series 11’s Alison Hammond and partner Robin Windsor also did a Cha Cha to ‘Celebration’ and scored 31, while ‘The People’s Strictly’ winner, former Royal Marine Medic Cassidy Little, returned alongside Natalie Lowe do to a Jive to ‘Cool Yule’, which scored 35.
Alison Hammond was back on the floor in her usual colourful style
The special also featured a video message from Sir Bruce Forsyth, who was due to host the show alongside Tess Daly, but had to pull out at the last minute due to health reasons.
Shirley Bassey and vocal group Blake were also on hand to provide a musical interlude, with their single ‘The Christmas Song (Chestnuts Roasting On An Open Fire)’.
‘Strictly Come Dancing’ returns for a new series next autumn on BBC One.