Saturday Night takes us to the fateful night of October 11, 1975 in Manhattan, where Lorne Michaels tried to launch his sketch comedy show for its first-ever episode, which we now know as the iconic and influential Saturday Night Live nearly 50 years later.

A film about SNL should make us laugh, feel revealing, and be packed with celebrity and pop culture history, and that’s exactly what Jason Reitman’s take on the sketch show’s beginning offers plenty of. The lovely 70mm look, long takes throughout the studio, and energetic score from Jon Batiste give the film a strong and dedicated technical edge.

While many films based on true stories have one or two casting choices that feel inspired, Saturday Night has dozens. Gabriel LaBelle, who’s probably a decade younger than Lorne Michaels was when this all went down, plays the creator with a contagious ambition to make magic for audiences on the stage. Rachel Sennott is sometimes the scene-stealer and the heart of it all, while Dylan O’Brien as Dan Aykroyd is one of his most fun performances in years. Cory Michael Smith brilliantly portrays the unstable ego of Chevy Chase, one of the most infamous members of the show’s original cast, while Matt Wood is uncanny in his recreation of the late John Belushi. Nicholas Braun is impeccable and unforgettable as not one but two cultural icons; they’re a pair of performances you have to see to believe. And we haven’t even mentioned Lamorne Morris, Cooper Hoffman, and Matthew Rhys, the latter of whom chews up the scenery as comedian George Carlin. More recognizable names Willem Dafoe and J.K. Simmons are also excellent and hysterical. The best part about this cast is that it reflects how Reitman wants us to feel about the characters and circumstances in the film — a ragtag group of youngsters with the potential to make us laugh, joining forces hoping to change the world.

As we know, the events of this movie, as chaotic as they unfold, did change the world. The most wonderful part about Saturday Night is that it celebrates the convergence of culture for half a decade, which began as NBC’s laughing stock but has since brought together millions with the arts of comedy, music, and performance joining together. The movie itself isn’t as funny as it thinks it is, but when a film celebrates laughter while making you laugh, those ingredients are the perfect groundwork for a purely entertaining wonder, even as you watch everything go wrong (at first). Fans of SNL will have a delightful time with the mythology of 20th-century American comedy, but anyone else will still have a great time with Reitman’s love letter to popular culture, humor, New York City, and the underdog.