ONCE Composer Glen Hansard Set for LATE SHOW WITH DAVID LETTERMAN Tonight

Glen Hansard, composer of Broadway's Tony and Grammy Award-winning Best Musical, Once will perform on the "Late Show with David Letterman" between 11:30PM-12:30AM and "Live on Letterman" at 9PM EST tonight, December 12th. Check local listings.

CBS Interactive's award-winning webcast concert series, "Live on Letterman," will feature Academy Award winning singer-songwriter Glen Hansard performing live from the world-famous Ed Sullivan Theater in New York City and webcast on CBS.com and VEVO, tonight, Dec. 12 (9:00 PM, ET/6:00 PM, PT).

ONCE is based on the 2007 Academy Award-winning film and plays on Broadway at the Bernard B. Jacobs Theatre (242 West 45th Street). The production opened to rave reviews on Sunday, March 18, 2012.

ONCE won eight Tony Awards including Best Musical. The production was also named Best Musical by the New York Drama Critics Circle, Drama Desk, Drama League, Outer Critic Circle and Lucille Lortel Awards.

ONCE is the winner of the 2013 Grammy Award for Best Musical Theater Album.

ONCE features a book by award-winning Irish playwright & screenwriter, Enda Walsh (Penelope, Hunger, The New Electric Ballroom), the Academy Award-winning music and lyrics of Glen Hansard and Markéta Irglová, direction by the acclaimed John Tiffany (Black Watch), movement by Steven Hoggett (Black Watch, American Idiot) and music supervision and orchestrations by Martin Lowe (Mamma Mia!).

The cast of Once features Arthur Darvill as 'Guy' and Joanna Christie as 'Girl.' Also in the company are Adam Wesley Brown, Laurel Griggs, David PatRick Kelly, Jillian Lebling, Katrina Lenk, Brandon McGibbon, Anne L. Nathan, Andy Taylor, Carlos Valdes, Erikka Walsh, Paul Whitty, and J. Michael Zygo.

Arthur Darvill and Joanna Christie are appearing with the support of Actors' Equity Association. The Producers gratefully acknowledge Actors' Equity Association for its assistance of this production.

ONCE is now playing in London's West End at The Phoenix Theatre where it opened April 9 after premiering to critical acclaim in Dublin in February 2013. Once is also playing to rave reviews in cities around the country on a US national tour.

Featuring an impressive ensemble of actor/musicians who play their own instruments onstage, Once tells the enchanting tale of a Dublin street musician who's about to give up on his dream when a beautiful young woman takes a sudden interest in his haunting love songs. As the chemistry between them grows, his music soars to powerful new heights... but their unlikely connection turns out to be deeper and more complex than your everyday romance. Emotionally captivating and theatrically breathtaking, Once draws you in from the very first note and never lets go. It's an Unforgettable story about going for your dreams and the power of music to connect us all.

The original cast recording of Once is available via MASTERWORKS BROADWAY, a label of Sony Masterworks. Visit www.MasterworksBroadway.com for more information.

Tickets for the Broadway production are now on sale via Telecharge.com or by phone at 212-239-6200.