East High Gets Ready to "Let It Go" at Summer Camp in the "HSMTMTS" Season 3 Trailer

The main cast, including Joshua Bassett, Matt Cornett, Sofia Wylie, and more — is back for season three. Following the season two finale, many fans wondered if Olivia Rodrigo would be exiting the show; however on Dec. 9, Time confirmed that the "Sour" singer and her character would indeed return for season three.