TELLURIDE, Colo. - CBS Films helped the 40th annual Telluride Film Festival get off to a musical start by bringing in the Punch Brothers to perform at an opening night concert Wednesday night. Chris Thile and his band appear on the soundtrack to the Coen brothers' upcoming "Inside Llewyn Davis," and they played some bluegrass favorites to a nice crowd in the town park.

The film stars Oscar Isaac as a folk singer in 1960s New York. Isaac joined the band for a rendition of "Fare Thee Well (aka Dink's Song)."

The film made its debut earlier this year at the Cannes Film Festival. Read our review here. It also stars Carey Mulligan, John Goodman, Garrett Hedlund and Justin Timberlake.

"Inside Llewyn Davis" will have its North American premiere tonight at the Telluride Film Festival. It opens in the U.S. December 6.