Heart is an American rock band formed in 1973 in Seattle, Washington. The band evolved from previous projects led by founding members Roger Fisher (guitar) and Steve Fossen (bass guitar), including The Army (1967–1969), Hocus Pocus (1969–1970), and White Heart (1970–1973). By 1975, original members Fisher, Fossen, and Ann Wilson (lead vocals and flute), along with Nancy Wilson (rhythm guitar, vocals), Michael Derosier (drums), and Howard Leese (guitar, keyboards and backing vocals) formed the lineup for the band's initial mid- to late-1970s success period. These core members were included in the band's 2013 induction into the Rock and Roll Hall of Fame.

Heart rose to fame with music influenced by hard rock and heavy metal as well as folk music. The band underwent a major lineup change between the late 1970s and the early 1980s; by 1982 Fisher, Fossen, and Derosier had all left and were replaced by Mark Andes (bass) and Denny Carmassi (drums). Though the band's popularity fell off during the initial years with the new lineup, they staged a comeback in the mid 1980s, buoyed by major radio hits that continued into the 1990s. Heart disbanded in 1998, though they have resumed touring and recording multiple times since then, with the Wilson sisters being the only consistent members. Heart's US Top 40 singles include "Magic Man" (1975), "Crazy on You" (1976), "Barracuda" (1977), "What About Love" (1985), "Never" (1985), and "All I Wanna Do Is Make Love to You" (1990), along with no. 1 hits "These Dreams" (1986) and "Alone" (1987).

Heart has been nominated for four Grammy Awards, and has sold over 50 million records worldwide, including approximately 22.5 million albums in the United States. They have placed top ten albums on the Billboard 200 in the 1970s, 1980s, 1990s, and 2010s. Heart was ranked number 57 on VH1's "100 Greatest Artists of Hard Rock" and ranked number 49 on Ultimate Classic Rock's Top 100 Classic Rock Artists.