TV: ABBA's Benny Andersson and Bjorn Ulvaeus Perform with MAMMA MIA! Cast at Oliviers!

On Sunday 6 April, the global smash hit musical Mamma Mia! celebrated its 15th birthday in London. Benny Andersson and Björn Ulvaeus, who have rarely performed together since ABBA disbanded in 1982, joined the cast of Mamma Mia! in a musical finale at this year's Olivier Awards as part of the birthday celebrations. Below, BroadwayWorld brings you a clip of the duo singing 'Thank You For The Music' with Emma Crossley from the London cast of MAMMA MIA! at the 2014 Olivier Awards!

MAMMA MIA! originally opened in London at the Prince Edward Theatre on 6 April 1999, before transferring to the Prince of Wales Theatre in 2004. The musical re-opened at the Novello Theatre in 2012 and celebrated its third London home with a Gala in aid of BBC Children In Need.

From West End to global phenomenon, the London production of Mamma Mia! has been seen by more than 10% of the entire UK population. The show has celebrated over 6,200 performances in London and has broken box office records in all three of its London homes. In 2011, it became the first Western musical ever to be staged in Mandarin in the People's Republic of China. This summer, the Mamma Mia! International Tour will play an exclusive UK Summer Season at the Blackpool Opera House from 20 June to 14 September 2014. Blackpool will be the only UK venue outside of London to host the worldwide hit musical this year.