Alex Greenwald is an American musician, singer, songwriter, and actor, best known as the lead vocalist of the indie rock band Phantom Planet. Formed in 1994, Phantom Planet gained widespread recognition with their hit single "California," which served as the theme song for the television series *The O.C.* in the early 2000s. The song showcased the band's blend of alternative rock and pop sensibilities, contributing to their status in the music scene. In addition to his work with Phantom Planet, Greenwald has pursued a solo career and collaborated with various artists, including producing and writing for other musicians. His solo work often reflects a mix of indie rock and electronic influences, highlighting his versatility as an artist. Greenwald's impact on music is marked by his contributions to the early 2000s indie rock revival and his ability to blend genres. His distinctive voice and lyrical style have influenced a generation of musicians within the alternative and indie scenes. As of October 2023, his ongoing work continues to resonate with fans, cementing his legacy in contemporary music.