They have the same last name and will be playing husband and wife at the Belasco Theatre.
Check out photos of the two-time Tony winner's opening night.
The award is named for the prolific playwright of The Orphans' Home Cycle.
Other stars included Richard Kind, Lewis Black, F. Murray Abraham, and Bill Pullman, among others.
Lippa's oratorio was performed last night at Lincoln Center's Avery Fisher Hall.
The new Ahrens and Flaherty musical is directed and choreographed by Susan Stroman.
See the Six Feet Under and Dexter star like you've never seen him before.
Simon Stephens' new drama at the Barrymore Theatre stars Alex Sharp.