Who played Christine and phantom on the 25th anniv?

On the 25th anniversary of "The Phantom of the Opera," celebrated at the Royal Albert Hall in London, Christine Daaé was played by Sierra Boggess, while the Phantom was portrayed by Ramin Karimloo. This special performance took place on October 2, 2011, and featured a star-studded cast alongside the leads. Their performances were widely praised and contributed to the event's iconic status in musical theater history.