AnnaSophia Robb has joined Kathy Bates, John Malkovich, Tim Blake Nelson, Stephen Root and Lewis Pullman in the cast of “Thelma.” The Exchange is selling the film at Berlin’s European Film Market. Robb starred in Hulu’s Emmy-winning series “The Act,” Hulu’s “Little Fires Everywhere” and HBO Max’s “The Carrie Diaries,”…