Alexander Martin "Al" Barr (born September 12, 1968 in Hanover, New Hampshire) has been the lead singer of the Dropkick Murphys since 1998. He was also a founder and lead singer for The Bruisers, which he helped form in 1988 in Portsmouth, New Hampshire. His first band circa 1984, was called D.V.A. (Direct Vole Assault). He also went on to front 5 Balls of Power, with future members of Scissorfight, The Radicts, L.E.S. Stitches, and US Bombs, before he formed The Bruisers. His band the Bruisers had played many shows with Boston's Dropkick Murphys, and when Dropkick lead singer Mike McColgan quit the band in 1998 the Murphys asked Barr to be the new lead singer. The first album the Dropkick Murphys released with Barr as singer was 1999's The Gang's All Here.
Barr is of Scottish descent on his father's side and German on his mother's side. He speaks German which he uses on stage to interact with the audience at shows in countries where German is the official language.
Barr and his wife Jessica had their first child, Strummer Barr who was born in January 2004 and was named after Joe Strummer of The Clash.