Peter Lawrence Buck is an American musician and songwriter. He was a co-founder and the lead guitarist of the alternative rock band R.E.M.; he played the banjo and mandolin on several R.E.M. songs. Throughout his career with R.E.M. (1980–2011), as well as during his subsequent solo career, Buck has been at various times a member of numerous side project groups. These groups included Arthur Buck, Hindu Love Gods, The Minus 5, Tuatara, The Baseball Project, Robyn Hitchcock and the Venus 3, Tired Pony, The No-Ones, and Filthy Friends, each of which have released at least one full-length studio album. Additionally, the experimental combo Slow Music have released an official live concert CD. Another side project group called Full Time Men released an EP while Buck was a member. As well, ad hoc "supergroups" Bingo Hand Job, Musical Kings and Nigel & The Crosses have each commercially released one track. Buck's latest project as of 2025 is Drink The Sea, and the band has released a self-titled double album in Autumn 2025.