According to playwright David Mamet, “Age and treachery will always beat youth and exuberance.” And, if 93-year-old Thelma Post (June Squibb) has anything to say about it in this fact-based action-comedy-drama, you can take that notion to the bank. In this story of a spry but sometimes-gullible widowed retiree living on her own, we watch – often in jaw-dropping awe – a feisty, independently minded senior determined to get her money back when she’s scammed out of her funds in a phone-based phishing scheme. Thelma says nothing about her plan to her family (Fred Hechinger, Parker Posey, Clark Gregg), who are already concerned about her ability to continue living on her own, and recruits the assistance of a wily old friend (Richard Roundtree) to join her in her quest to retrieve the stolen cash. The result is an uproarious farce featuring humor that’s clearly outlandish but never implausible or over the top. But there’s more to this offering than laughs – the sight of capable, underestimated elderly folks taking charge over their lives (and, in the case of this picture, even performing their own stunts!) is truly inspiring. This is backed by a potent, poignant (though never preachy) underlying look at what it’s like to grow old and the losses that come with it, a bittersweet meditation on the inevitable changes that come with age and how all too quickly they arrive, material that’s deftly and often philosophically interwoven with the comedy. Director Josh Margolin’s debut feature represents an impressive premiere for the writer-actor, featuring a superbly penned, well-balanced, evenly paced script relating the experiences of his own 103-year-old grandmother, who’s still alive and kicking and whose real-life home was used as one of the film’s principal movie sets. It’s also a triumph for 94-year-old Squibb in her career’s first-ever lead role, one worthy of Oscar contention that effectively depicts a wide-ranging talent that’s been bottled up for far too long. And the film is a fine showcase for Roundtree in his final feature film performance, one in which we see him in a different light from many of his previous roles and in which he’s perfectly matched with his cunning co-star. My only issue with the picture is with the portrayal of Thelma’s family, in which the development of its three principals never comes off quite right, seemingly reaching for something that doesn’t gel properly, an aspect of the narrative that clearly could have used some further refinement. Otherwise, though, “Thelma” (or “Thelmaf” as it was known in an alternate version of the title) is one of the funniest, best produced releases that I’ve seen in quite some time. So hop on your scooter and get your behind to see this one – or else.