Marty McFly's red guitar from the original "Back to the Future" is missing and the movie's cast and filmmakers are asking for the public's help.

Great Scott! The search is on to find the guitar Marty McFly played to a crowd of '50s-era high school students at the Enchantment Under the Sea Dance back in Back to the Future, which celebrates its 40th anniversary this summer.

NASHVILLE, Tenn. (AP) — Marty McFly grabbed a guitar in “Back to the Future” and rocked out with the band at a 1950s high school dance, helping him narrowly avoid blinking out of existence before time-traveling back to the 1980s. The guitar, in real life, wasn’t as lucky.