My Old Ass star Maisy Stella: ‘I think Justin Bieber had to watch my scene to approve it’ - RISING STARS: The 20-year-old Canadian actor is a revelation opposite Aubrey Plaza in the new coming ...

PARK CITY, Utah (AP) — "Who’s that girl?” was a common refrain from Sundance Film Festival goers walking out of “ My Old Ass ” in January. The girl in question is its vibrant star, Maisy ...