Thin Lizzy met while at school in Dublin in the early 1960s. Lynott, born 20 August 1949 in West Bromwich, England to an Irish mother Philomena (1930– ) and Guyanese father Cecil Parris (1925–2010), was brought up in Dublin from the age of three. Downey, born 27 January 1951, is a Dublin native. Lynott joined a local band, The Black Eagles, as vocalist in 1963, and Downey was recruited as their drummer in 1965. In 1967, Lynott was asked to join Skid Row by bass guitarist Brush Shiels, who brought teenage Belfast guitarist Gary Moore (4 April 1952 – 6 February 2011)
Thin Lizzy on to tour the US playing clubs in early 2001, but Wharton had already left the band by the time of the tour. From 2000 to 2003, Mendoza toured with Ted Nugent, and with Whitesnake in 2004. Sykes released two solo albums during 2002–03, while Gorham worked with his band 21 Guns. Thin Lizzy performed sporadically during this period, recruiting some musicians for single tours, such as bass guitarist Guy Pratt for the Global Chaos Tour of 2003. Wharton later stated that Thin Lizzy would have been better suited to playing fewer concerts, in bigger venues. He also felt that