The festive musical is currently running in Hammersmith
Louis Walsh is currently making his stage debut in Nativity The Musical at the Eventim Apollo.
To celebrate the occasion, a flock of stars including Emma Bunton, Samantha Barks, Rufus Hound and Sinitta came to the musical for a festive gala.
The show, which has been touring across the UK since it opened at the Birmingham Rep, is written and directed by Debbie Isitt, and adapted from her hit Christmas movies of the same name.
Nativity! stars Daniel Boys (The Boys in the Band) as Paul Maddens alongside Sarah Earnshaw (Wicked) as Jennifer Lore and Simon Lipkin (Avenue Q) as Mr Poppy.
In our five-star review, Diane Parkes described it as 'a warm-hearted family show with lively performances, great songs, brilliant sets and lots of cheer and good will'.
It was recently announced the piece would also return for a UK tour in 2018.
Nativity! runs at the Eventim Apollo until 17 December 2017. It will begin its UK tour in Coventry in October 2018.