Opening Night Of MAMMA MIA! The Party At London's The O2
LONDON, ENGLAND - SEPTEMBER 19: Bjorn Ulvaeus makes a cameo in his original ABBA costume from 1977 at the opening night of MAMMA MIA! The Party at The O2 on September 19, 2019 in London, England. (Photo by David M. Benett/Dave Benett/Getty Images for Mamma Mia)