Punch Brothers were the musical guests on The Late Show with David Letterman last night. The band performed "This Girl," off their latest new album, Who's Feeling Young Now?, released on Nonesuch Records earlier this year. Also on the show were Kiefer Sutherland and Eugene Levy. You can watch the complete episode at cbs.com and watch the band's performance of "This Girl" below.

As noted earlier this week in the Nonesuch Journal, Punch Brothers will soon be hitting the road again with the next leg of their US tour. Following solo performances from mandolinist Chris Thile at San Francisco's Herbst Theatre on Sunday, the band kicks things off with a live broadcast performance of A Prairie Home Companion with Garrison Keillor on Saturday, April 14. Tune in to public radio stations across the US and online then at prairiehome.org to hear the band live with Keillor and crew at New York's Town Hall. Punch Brothers return to Town Hall later this month as part of their headlining tour, with Jesca Hoop opening.

The tour also makes a stop in Austin, where the band will tape an episode of Austin City Limits at Moody Theater on May 1 for future broadcast on PBS—raffle for free tickets will be announced on ACL's site shortly—and play a sold-out show at Antone's on May 2. The tour wraps up with a sold out LA Bluegrass Situation show at Largo in Los Angeles on May 4. Several summer festival dates follow.

For more tour information and ticket links, go to nonesuch.com/on-tour.

Also this month, How to Grow a Band, an independent documentary by filmmaker Mark Meatto that chronicles the debut of "The Blind Leaving the Blind," featured on the Punch Brothers' 2008 Nonesuch debut album, Punch, is opening theatrically at New York's Village East Cinema on April 13; tickets are on sale now. Band members Gabe Witcher, Chris Eldridge, and Paul Kowert will join the filmmakers for a special Q&A following the 8 PM Opening Night screening.

Watch Punch Brothers perform "This Girl" on The Late Show with David Letterman via The Audio Perv: