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A Funny Thing Happened on the Way to the Forum is a musical with music and lyrics by Stephen Sondheim and book by Burt Shevelove and Larry Gelbart. Inspired by the farces of the ancient Roman playwright Plautus (251-183 BC), specifically Pseudolus, Miles Gloriosus, and Mostellaria, the musical tells the bawdy story of a slave named Pseudolus and his attempts to win his freedom by helping his young master woo the girl next door. The plot displays many classic elements of farce, including puns, the slamming of doors, cases of mistaken identity (frequently involving characters disguising themselves as one another), and satirical comments on social class. The title derives from a line often used by vaudeville comedians to begin a story: "A funny thing happened on the way to the theater".

A revival opened on Broadway at the Lunt-Fontanne Theatre on April 4, 1972 and closed on August 12, 1972 after 156 performances. Directed by co-author Burt Shevelove the cast starred Phil Silvers as Pseudolus (later replaced by Tom Poston), Lew Parker as Senex, Carl Ballantine as Lycus and Reginald Owen as Erronius. Larry Blyden, who played Hysterium, the role created by Jack Gilford, also co-produced. "Pretty Little Picture" and "That'll Show Him" were dropped from the show, and were replaced with "Echo Song" (sung by Hero and Philia), and "Farewell" (added for Nancy Walker as Domina, as she and Senex depart for the country). "Echo Song" and "Farewell" had been added to a production staged in Los Angeles the previous year and were composed by Sondheim. They had to close soon after Phil Silvers suffered a stroke. The show won two Tony Awards, Best Leading Actor in a Musical for Silvers, and Best Featured Actor in a Musical for Blyden.  The musical was revived again with great success in 1996, opening at the St. James Theatre on April 18, 1996 and closing on January 4, 1998 after 715 performances. The cast starred Nathan Lane as Pseudolus (replaced by Whoopi Goldberg and later by David Alan Grier), Mark Linn-Baker as Hysterium, Ernie Sabella as Lycus, Jim Stanek as Hero, Lewis J. Stadlen as Senex, and Cris Groenendaal as Miles Gloriosus. The production was directed by Jerry Zaks, with choreography by Rob Marshall. Lane won the 1996 Tony Award for Best Leading Actor and the Dramas Desk Award, Outstanding Actor in a Musical; the production was nominated for the 1996 Tony Award and Drama Desk Award, Revival of a Musical.  Every actor who has opened in the role of Pseudolus on Broadway (Zero Mostel, Phil Silvers, and Nathan Lane) has won a Best Leading Actor Tony Award for his performance. In addition, Jason Alexander, who performed as Pseudolus in one scene in Jerome Robbins' Broadway, also won a Tony for Best Actor in a Musical.

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A Funny Thing Happened on the Way to the Forum