Nils Lofgren (born June 21, 1951 in Chicago, Illinois), is an American rock music singer, songwriter, and guitarist.
Moving to the Washington, D.C., area as a teenager, Lofgren joined Neil Young's band at age 17, playing piano on the album After the Gold Rush among others. He was also briefly a member of Crazy Horse appearing on their 1971 LP. From 1971 to 1974 recorded four albums with his own band, Grin.
After that he continued as a solo artist, and had FM radio hits in the mid-1970s with "Back It Up", "Keith Don't Go" (about Keith Richards' Toronto drug arrest crisis), and "I Came to Dance". His song "Bullets Fever", written about the 1978 NBA champion Washington Bullets, would become a cult favorite in the Washington area.
In 1984, he joined Bruce Springsteen and the E Street Band as the replacement for Steven Van Zandt in the second guitarist role. The E Street Band was mostly inactive for the decade after 1989, but both he and Van Zandt rejoined it when Springsteen revived the band in 1999.