Jon Osbaldeston to join Mamma Mia! The Party at London's O2

Emmie Newitt 15 January, 2026, 14:28

Osbaldeston joins London's premier theatrical dining experience, which has played at The O2 since 2019 and has welcomed over 600,000 guests. Mamma Mia! The Party gives people a full evening of dancing, dining, and singing to some of ABBA's greatest hits.

Jon Osbaldeston. Photo provided by production.

Jon Osbaldeston will join in the role of Nikos, starting performances on 28 January 2026. His theatre credits include the West End productions of Les Misérables and Fiddler on the Roof, as well as being one of the co-founders of the internationally acclaimed musical theatre group The WestEnders.

He takes over from Fed Zanni and joins existing cast members Marianne Benedict (Matilda) as Kate (at certain performances), Kimberly Powell as Kate (at certain performances), Oscar Balmaseda as Host/Fernando, Paola Fareri (The Lion King) as Konstantina, Natalie Winsor (A Midsummer Night’s Dream, UK tour) as Debbie, AJ Bentley as Adam, Dawn Spence as Grandma, Rebecca Stenhouse (Grease, UK tour) as Nina, Allie Ho Chee (at certain performances) and Rosie Rowlands (at certain performances) as Bella, Constantine Andronikou (International Magic Tenors) as Robin/Swing, Robban Hogstrom as Leo/Swing, and Nathan Shaw (White Rose) as Carlos/Swing, Kelly Aaron as Sue/Swing, Claudia Bradley as Loretta/Swing, Deschenes Graham as Joyce/Swing, along with the musicians John Donovan, Flo Blue, Luke Higgins, Luke Roberts and Steve Rushton.

Guests are invited to take their seats at Nikos' family-run taverna, where they can enjoy a delicious four-course Greek feast, whilst a romantic and heartwarming story unfolds all around them. Following the performance, which is filled with timeless ABBA anthems such as Mamma Mia, Dancing Queen and Waterloo, guests are encouraged to sing and dance the night away at a glittering ABBA disco.

If you love a bit of ABBA, don't forget about the West End production of Mamma Mia! at the Novello Theatre too.

Mamma Mia! The Party is currently booking until 4 April 2027.