"X-Kid" is a song by American rock band Green Day. It is the fifth track on their eleventh studio album, ¡Tré! (2012), and was released as the second single from the album on February 12, 2013, and is the sixth and final single from the ¡Uno!, ¡Dos! & ¡Tré! trilogy.

¡Tré! is the eleventh studio album by the American rock band Green Day. It is the third and final installment in the ¡Uno! ¡Dos! ¡Tré! trilogy, a series of studio albums that were released from September to December 2012. Green Day started recording material for the album on February 14, 2012, and finished on June 26, 2012. ¡Tré! follows the power pop style of ¡Uno!, and the garage rock feel of ¡Dos!. The album's title is a nod to the band's drummer Tré Cool, who turned 40 years old two days after the release. Cool is also featured on the album's cover. It is the band's last album with touring guitarist Jason White joining the band in the studio as a session member.