Echosmith is an American indie pop band formed in February 2009 in Chino, California. Originally formed as a quartet of siblings, the band currently consists of Sydney, Noah and Graham Sierota, following the departure of eldest sibling Jamie in 2016. Known originally as "Ready Set Go!" when they signed to Warner Bros. Records in May 2012 they changed their name to "Echosmith," and a year later opened for on tour. They are best known for the song "Cool Kids", which reached number 13 on the Billboard Hot 100 and was certified triple platinum by the RIAA with over 1,200,000 sales in the United States, it also made double platinum in Australia as reported by ARIA. "Cool Kids" was Warner Bros. Records fifth-biggest-selling-digital song of 2014, with 1.3 million downloads sold. Echosmith's debut album, Talking Dreams, was released on October 8, 2013.
The group grew up in a musical household playing multiple instruments throughout their childhood. The band has mentioned that numerous rock artists, including Coldplay, The Smiths, The Killers, U2, and Fleetwood Mac influenced them while growing up and encouraged them to make music together. Echosmith’s youngest sibling, Graham, plays drums. The only female member in the group, Sydney, is the lead vocalist for the band, often contributing on tambourine and keyboard. Noah plays bass and sings back-up vocals for the band. The oldest sibling, Jamie, was co-lead singer and played guitar before leaving the band in 2016.
In mid 2014,returned with the five-song EP , which featured acoustic reworkings of cuts from . By 2015, the quartet toured with and , Later that year, parted ways with his siblings to focus on family, leaving to continue as a trio.
Leading up to what was supposed to be the release of the band's sophomore album and corresponding tour, "Goodbye" was released as the lead single on July 14, 2017.One week later, the band performed their new single live for the first time at the 2017 MTV Fandom Awards during San Diego Comic-Con. In March of 2018, the band released a new lead single, "Over My Head." Later that Summer, the band opened for Pentatonix on their tour and rounded out the year with a Christmas show in San Diego on December 8, 2018. On March 8, 2019, Echosmith released their single "Favorite Sound," as a collaboration with musician Audien, as well as a cover of "Reflektor" by Arcade Fire,[originally from 2013.