Tegan and Sara cast TikTok twin sisters to play teen versions of themselves on IMDb TV's High School, plus Cobie Smulders and Kyle Bornheimer as their parents

The Hollywood Reporter

TikTok twins Railey and Seazynn Gilliland will make their television debuts in the series co-created by the Canadian musicians Tegan and Sara Quin, based on their time in high school. Smulders and Bornheimer will guest as their parents.