Once, the new stage musical based on the independent film about an Irish singer-songwriter who meets a muse in the person of a Czech immigrant, opens at Broadway's Bernard B. Jacobs Theatre on March 18. A company of 13 actor-musicians—led by Steve Kazee (110 in the Shade, Spamalot) as Guy and Cristin Milioti (Off-Broadway's That Face, Stunning, The Heart Is a Lonely Hunter) as Girl—performs all roles and serves as the on-stage orchestra in the Dublin-set fable. The score by the film's original stars Glen Hansard and Markéta Irglová includes the Academy Award-winning song "Falling Slowly," plus other numbers from the indie hit.