The Gala Night for Mamma Mia! The Party in London was a star-studded affair and it celebrated the production's new partnership with the charity Nordoff and Robbins as well as the introduction of a new “Nikos” in the form of Blue singer, Anthony Costa who had joined the cast at the end of August 2023.

The event was attended by various celebrities, including Claire Sweeney (actress), Duncan James (Blue singer), Vanessa Feltz (broadcaster), Katherine Ryan (comedienne), Alison Steadman (actress), Craig Revel-Horwood (Strictly Come Dancing judge), Fatima Whitbread (athlete), Sandi Toksvig (comedian and author) and Stacey Haynes (Mamma Mia! The Party choreographer), Charlie Condou (actor and journalist), Lemar (singer), Alice Beer (broadcaster), Laura Tobin (weather presenter) and Richard Arnold (broadcaster), Bethany England (England footballer), Ashley James (TV personality), Jenny Powell (broadcaster), Gillian McKeith (nutritionist), Nina Wadia (actress), Juliet Stear (TV chef), Dame Kelly Holmes (athlete), Michelle Heaton (Liberty X singer), Juliet Mayhew (from the Real Housewives of London), Cathy Newman (journalist), Heidi Range (Sugababes singer), Tasha Ghouri and Andrew Le Page (Reality TV stars), Tina Hobley (actress), Demi Jones (reality TV star), Sinitta (singer), Alexa Davies (actress (played young Rosie in Mamma Mia! Here We Go Again!), Ellie Simmonds (paralympic swimmer), Michael Gunning (swimmer), Mathilde Barker (YouTuber) and Robin Windsor (professional dancer).

Ahead of the event there was lots of promotion with Björn meeting various press outlets with Anthony Costa - they had a really good rapport with each other. Afterwards, there was other promotion outside the venue doors and inside.

1. Irish Independent
2. Smooth Radio
3. What's On Stage
4. Unknown interview
5. Sky News 1
6. Sky News 2
7. Björn's Instagram - Competition Winners
8. Mamma Mia! The Party - A midweek reminder to book your Mamma Mia! The Party tickets
9. Mamma Mia! The Party - Björn clicks his fingers
10. Mamma Mia! The Party - The man himself
11. Mamma Mia! The Party - Welcomes the new Nikos
12. Mamma Mia! The Party - Sandi Toksvig & Björn