Kristen Wiig is said to be selected for Marielle Heller’s new coming of age tale Diary Of A Teenagers , which also boasts Alexander Skarsgard and M.I. High’s Bel Powley. The script, which Heller has incripted through the Sundance Institute’s screenwriting and directing labs, is based on Phoebe Gloeckner’s graphic novel and follows a teenage artist (Powley) in 1970s San …