PARK CITY, Utah (AP) — “Who’s that girl?” has been a common refrain from Sundance Film Festival goers walking out of “My Old Ass” this week in Park City, Utah.

Its star Maisy Stella, 20, will be a familiar name to some, for her years on “Nashville” playing Daphne Conrad, for her viral video singing with her sister Lennon Stella (31 million views and counting), and for being someone . But to a certain subset of cinephiles, Stella is a complete discovery and an exciting one at that.

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