They announced their debut EP, Scout, alongside the release of the second single, "Louie", on 12 April 2018.
[2] Prior to Calpurnia's formation, Finn Wolfhard had met drummer Malcolm Craig in 2014, on the set of the music video for "Guilt Trip" by PUP, while guitarist Ayla Tesler-Mabe was a friend from rock camp and bassist Jack Anderson was recruited for a charity fundraiser.
[5] In January 2018, the band performed at the Rough Trade in New York City, covering "Here She Comes Now" by The Velvet Underground, "Where Is My Mind?"
[6] The band's official debut, "City Boy", was released on 7 March 2018 and was the lead single of their then-unannounced Scout EP.
The band made their television debut on 23 July 2018 as the musical guest on Jimmy Kimmel Live.