The company offered a medley of "Life Is like a Train" and "Babette."

Watch the performance below.

On the Twentieth Century — featuring music by Cy Coleman and book and lyrics by Betty Comden and Adolph Green — premiered on Broadway in 1978 under the direction of Harold Prince and won Tony Awards for Best Original Score and Best Book of a Musical.

Here's how Roundabout bills the classic: "It's nonstop laughs aboard the Twentieth Century, a luxury coach travelling from Chicago to New York City. Luck, love and mischief collide when the bankrupt theater producer Oscar Jaffe (Gallagher) embarks on a madcap mission to cajole glamorous Hollywood starlet Lily Garland (Chenoweth) into playing the lead in his new, non-existent epic drama. But is the train ride long enough to reignite the spark between these former lovers, create a play from scratch, and find the money to get it all the way to Broadway?" The design team includes David Rockwell (sets), William Ivey Long (costumes), Donald Holder (lights), Jon Weston (sound), Kevin Stites (musical director), Larry Hochman (orchestrations) and David Krane (dance arrangements and incidental music).

The American Airlines Theatre on Broadway is located at 227 West 42nd Street. For tickets, call (212) 719-1300 or visit RoundaboutTheatre.org.