Mark Sheehan is an Irish musician and songwriter, best known as the guitarist for the popular band The Script. Born on October 29, 1976, in Dublin, Ireland, he co-founded the band in 2001, contributing to their distinctive sound that blends pop, rock, and soul elements. Throughout his career, Sheehan has played a significant role in writing many of The Script's hit songs, including "Breakeven" and "Hall of Fame." His work has earned the band numerous awards and a dedicated fan base worldwide, solidifying their place in contemporary music.