The Grammy Award-winning a capella group Chanticleer will perform a Christmas concert at Christ & Holy Trinity Church on Saturday evening, Dec. 6.

The show, "A Chanticleer Christmas," will include a wide array of holiday vocals, from chant and early music to a new work commissioned by Chanticleer to a medley of carols and spirituals, the church said.

Tickets are $65, and all seats are unreserved. They are available in advance online and by phone. Tickets will be available at the door if any remain.

Founded in San Francisco in 1978 to perform Renaissance music, the 12-voice ensemble's repertoire has since expanded to include jazz, gospel and new music.

Over the past 20 years the group has performed around the world, according to its website. The New Yorker magazine called the 12-voice group "the world's reigning male chorus."

Contrasting highlights of the Christmas concert, Christ & Holy Trinity said, will be performances of a new piece and a sacred classic.

Chanticleer will sing "Rose of Roses," a piece it commissioned Swedish composer Fredrik Sixten to write for it, and give its rendition of Franz Biebl's "Ave Maria."

Chanticleer is in high demand during the Christmas season. The Westport show is one of 18 holiday concerts squeezed into a 24-day U.S. tour and is sandwiched between performances the day before and the day after in New York City.

Before the concert, Staples High School's select choral group, the Orphenians, will sing carols outside the church, according to the release. The Orphenians have been invited to a national youth choral festival sponsored by Chanticleer in San Francisco in March.

A reception for performers and the audience will follow the concert.

The Westport concert marks its fourth appearance in town in the past 14 years, Christ & Holy Trinity said, and is part of the church's Music & Art series.

For advance tickets, visit www.chtwestport.org/tickets or call Christ & Holy Trinity at 203-227-0827.