Dropkick Murphys: Ken Kasey, Ken Casey (vocals, bass guitar); Al Barr (vocals); Marc Orrell (guitar, banjo, accordion, background vocals); James Lynch (guitar, background vocals); Tim Brennan (acoustic guitar, banjo, mandolin, tin whistle, accordion, background vocals); Scruffy Wallace (bagpipe); Matt Kelly (drums, background vocals).

Personnel: Ronnie Drew, Spider Stacy (vocals); Rick Barton (guitars); Tim Weed, John Kingsley, Chris Baum, Armond Aromin, Andy Reiner (violin); Mike Calabrese, Keith Dickerhofe, Halley Feaster (cello); Jeni Magana, Matthew Edwards (double bass); Eric Baird (sampler, sequencer).

Additional personnel: Tallent (bagpipe); Danny Lynch, Mark Carey (background vocals).

Audio Mixer: Jim "the Hammer" Siegal.

Recording information: Westland Studios, Dublin, Ireland; Q Division Studios; Outpost Recording Studios, Stoughton, MA.