Advance sales as of March 17 were at $18 million, according to Variety, with the show taking in more than $300,000 a day in sales. The Broadway run had released a new block of tickets a minute after midnight following the opening night performance — which received favorable response from most critics.

Mike Nichols ("The Graduate," "Angels in America") directs the new musical inspired by the 1975 feature film comedy "Monty Python and the Holy Grail" which landed at Broadway's Shubert Theatre for a St. Valentine's Day (Feb. 14) start and a St. Patrick's Day (March 17) opening.

The self-proclaimed "lovingly ripped-off" show features a completely new score with music and lyrics by Idle and composer John Du Prez ("A Fish Called Wanda") with a book by Idle based on the screenplay he co-wrote with Monty Python creators Graham Chapman, John Cleese, Terry Gilliam, Terry Jones and Michael Palin.

Spamalot tells the tale of King Arthur and his Knights of the Round Table on their quest from God (voiced by a familiar actor) for the Holy Grail — with a short stop in the dazzling Spam-filled land of Camelot. The show boasts "a chorus line of dancing divas and knights, flatulent Frenchmen, killer rabbits and one legless knight" who sing and dance. (Python devotees will be happy to know The Knights Who Say "Ni!" also make an appearance.)

The new musical stars Tim Curry (The Rocky Horror Show, "Clue") as King Arthur, David Hyde Pierce ("Frasier," The Heidi Chronicles) as Sir Robin, Hank Azaria ("The Birdcage," Sexual Perversity in Chicago) as Sir Lancelot, Christopher Seiber (Into The Woods) as Sir Galahad, Michael McGrath (Wonderful Town) as Patsy et al., Steve Rosen (The Golem) as Sir Bedevere, Christian Borle (Thoroughly Modern Millie) as various roles and Sara Ramirez (A Class Act) as The Lady of the Lake. The show website can be found at www.montypythonsspamalot.com.