One of the musicians who released the Grammy-nominated "Fallling Slowly"  is also a guitarist for what Irish group?
The Swell Season (album) The Swell Season is the self-titled and first album by the duo The Swell Season, (Glen Hansard and Markéta Irglová), released in 2006. "Falling Slowly" went on to be nominated for a Grammy and win the Academy Award for Best Original Song in 2008.
Guaranteed Irish (band) Guaranteed Irish is an American folk band from Pittsburgh, Pennsylvania, currently consisting of Bruce Foley, Patrick Folan and Jimmy Lamb. To date they have released three albums and are classified as an Irish folk band.