The annual collection period culminated in a December 8 show at the New Amsterdam Theatre.
The event is the culmination of six weeks of fundraising for Broadway Cares/Equity Fights AIDS.
Both performers will step into their roles on January 7.
The Tony Awards committee held its first meeting of the 2014-15 season.
Broderick is set to stick around to head the cast with Martin Short.
Matthew Broderick and Michael Urie have also signed on for this month's show.
If you ever wondered what Nathan Lane and Megan Mullally looked like in selfie form, you're in luck.
The Broadway revival celebrated its first night with Sarah Jessica Parker, Angela Lansbury, Louis C.K., Eddie Izzard, Kristin Chenoweth, Nick Offerman, and many more celebs.