Jennifer Jason Leigh has joined the cast of James Ponsoldt’s “The Spectacular Now,” currently filming in Georgia.Andrew Lauren Prods., Shawn Levy’s 21 Laps and Global Produce are producing. Pic stars Shailene Woodley, Miles Teller and Brie Larson with Leigh portraying the mother of Teller’s character. Adapted from Tim Tharp’s novel by scribes Scott Neustadter and Michael H. Weber (“500 Days of Summer”), the tale follows a high school senior (played by Teller) and the introvert he attempts to save from life as a social outcast (played by Woodley). Tom McNulty and Shawn Levy are producing with Michelle Krumm and Andrew Lauren. Neustadter and Weber will exec produce alongside Marc Shmuger, Matthew Medlin and Ruth Mutch. Leigh was last seen in “Greenberg,” on which she was also a producer.