Want to sell out a classical-music concert? Just add the words "Downton Abbey" to the program. The Oratorio Society of Minnesota's Saturday performance of "The Music of Downton Abbey" at St. Mark's Cathedral has sold out, leaving artistic director Matthew Mehaffey concerned about the usual "150 to 200" walk-up ticket buyers who will have to be turned away.

A second St. Marks concert has been added at 7:30 p.m. on March 15.

The program features some compositions by John Lunn, an Emmy winner for the soundtrack of the popular drama about the high- and low-born residents of an estate in post-Edwardian England, as well as other pieces of the time that have been woven into a sort of musical narrative feauturing a long-lost relative of the Granthams. Some selections are intended to evoke memorable scenes from the series, such as Elgar's "The Snow" (the title of which any self-respecting Downton fan will instantly tie to the moment Matthew proposed to Lady Mary). The audience is invited to sing along on three well-known hymns, including -- of course -- Arne's "Rule, Britannia!."

For tickets to the added concert and more info, go to oratorio.org or call 612-432-7398.