Mamma Mia! I Have A Dream was a UK reality talent show with the aim of finding new lead roles of Sophie and Sky for the London production of Mamma Mia! ahead of its 25th Anniversary (and ABBA's 50th Anniversary of their Eurovision win).

Fourteen theatre hopefuls (seven boys, seven girls) headed off to Corfu, Greece where the potential Sophies and Skys were put through their paces by four judges; comedian Alan Carr, singer Jessie Ware, actress (and previous contestant in a similar competition to find a Nancy for Oliver! (I'd Do Anything)) Samantha Barks and singer Amber Riley.  The programme was hosted by Radio 2 DJ, Zoe Ball.  Producer Judy Craymer was present on some episodes.

In the live final, the British public decided in a vote who the winning Sky and Sophie were from the four finalists: Esme, Tobias, Stevie and Owen. The winners were Tobias and Stevie.

The first episode aired on 22 October 2023 with the live final on 10 December 2023.

Björn sent a pre-recorded congratulatory and good luck message to the finalists: "Hello, Esme, Stevie, Tobias and Owen. I just wanted to say a huge congratulations to each and every one of you on making it to the final. It's Mamma Mia's 25th Anniversary this year and no matter who wins, you have all four captured the spirit and the the magic of Mamma Mia! so you should feel incredibly proud of having gotten this far. Good luck tonight.  I'm rooting for all four of you."

YouTube link c/o MAMMA MIA! I Have A Dream