The This Morning presenter will be teaming up with The Chase quiz expert Bradley Walsh for a spectacular one-off game show on Christmas Eve.
Called Take Off, the show will see Holly, 38, and Bradley, 59, invite audience members to progress through a series of stages before having the chance win the star prize and jet off on a Lapland adventure.
On Christmas Day Debbie McGee will be among stars making a comeback on the Strictly dance floor for the festive Strictly special.
The 61-year-old widow of Paul Daniels has been partnered with Kevin Clifton for the dance extravaganza.
Actress Gemma Atkinson, 35, with be teaming up with her boyfriend Gorka Marquez, 29.
Claudia Winkleman and Tess Daly will be hosting the show and all four judges will be back for the programme, which will also see performances from British actress Chizzy Akudolu, 46, who starred in the 2017 series.
Good Morning Britain presenter Richard Arnold, 50, will be dusting off his best dance moves from 2012 with pro Luba Mushtuk.
YouTuber Joe Sugg, 28, will be reuniting with his girlfriend Dianne Buswell, 30, after the show brought them together during last year’s contest.
And Mark Wright, 32, will be showing off his dancing skills after being paired with Janette Manrara. Meanwhile, it emerged last night that Strictly’s Graziano di Prima set a new Guinness World Record in the It Takes Two Pro Challenge.
Professional dancers have been battling out to see who can achieve the most Samba Botafogo dance steps in 30 seconds.
Graziano and Giovanni Pernice both broke the previous world record, set in 2011 by Artem Chigvintsev, who achieved 79. Graziano won the challenge with 90 steps and Giovanni came a close second, with 80.