The musical also welcomed a host of other alums to mark the milestone occasion.
Bebe Neuwirth, James Naughton, Joel Grey, and Ann Reinking will celebrate by making cameos in tonight's show.
Ann Reinking, Bebe Neuwirth, James Naughton, and Joel Grey will reunite for the Kander and Ebb musical's record-breaking performance.
Stage favorites including Jason Robert Brown and Michael McKean were on hand for the afternoon event.
The spring performances will be broadcast on PBS.
It really happened…onstage…at the Tony Awards.