The evening will take place before the release of the new film adaptation of the musical.
The new musical will open in the West End at London's Aldwych Theatre in 2015.
Rumors about a transfer of the West End production have been confirmed.
Hearts are broken and rarely restored on the stages throughout Theatreland.
The show's cast and creative team met with the press on Friday.
The musical will be seen as part of the annual BBC Proms.
The hard-working Wicked star reveals her feelings about The Royal Albert Hall, a Pushing Daisies musical, and the Japanese version of "Popular."
The National Theatre is confirmed to house the immersive Imelda Marcos musical.