Happy_days_theme_song -

The show did not originally open with the song "Happy Days." Instead, it relied on a 1950s rock-and-roll classic to set the mood.

The "Happy Days" theme was penned by the prolific duo and Charles Fox , who were also responsible for hits like "Killing Me Softly with His Song" and the theme for Wonder Woman . Performer(s) Usage Period Original Recording Jim Haas (lead) & session singers Seasons 1–2 (Closing Credits) The Hit Version Pratt & McClain Seasons 3–10 (Opening & Closing) Final Version Bobby Arvon Season 11 (Opening & Closing) Commercial Success and Pop Culture Impact happy_days_theme_song

The opening theme was "Rock Around the Clock" by Bill Haley & His Comets. This choice was inspired by the song's successful use in the 1973 film American Graffiti , which also starred Ron Howard. The show did not originally open with the song "Happy Days