Tegan and Sara‘s upcoming TV series High School – check it out below.The pop duo’s 2019 book of the same name has been turned into a TV series for Amazon, with Tegan and Sara serving as executive producers alongside writer-director Clea DuVall.After being discovered by the duo themselves, TikTok stars and twins Railey Gilliland and Seazynn Gilliland have been cast to play teenage versions of Tegan and Sara respectively.Cobie Smulders (How I Met Your Mother) has also been cast to play their mother Simone, while Kyle Bornheimer (Brooklyn Nine-Nine) will play Simone’s boyfriend Patrick.The show is set to debut on Amazon’s Freevee service on October 14, after premiering at the Toronto International Film Festival (TIFF) next month.Check out the trailer below.In a statement about the show’s casting, Tegan Quin said: “It felt kismet when I saw Railey and Seazynn for the first time on TikTok. There was something undeniably intriguing about them: They were sweet and original, impossible not to watch.