Inspired by a real-life experience of director Josh Margolin's own grandmother, Thelma puts a clever spin on movies like Mission: Impossible, shining the spotlight on an elderly grandmother as an unlikely action hero. With infectious humor, Margolin employs the familiar tropes of the action genre in hilarious, age-appropriate ways to tackle aging with agency. In the first leading film role of her 70-year career, Squibb portrays the strong-willed Thelma with grit and determination, demonstrating that she is more than capable of taking care of business -- despite what her daughter Gail, son-in-law Alan, or grandson Danny might believe.