Magicians is a 2007 British comedy film directed by Andrew O'Connor and written by Jesse Armstrong and Sam Bain. The movie stars comedy duo Robert Webb and David Mitchell, who are more commonly known as Mitchell and Webb, two of Britain’s most prominent comedians, known for their deadpan delivery and razor-sharp sarcasm. The film also features Sarah Hadland and Jessica Hynes, as well as guest appearances from other notable British comedians. A hilarious exploration of the often absurd world of stage magic, Magicians is as much about friendship, rivalry and personal growth as it is about misdirection and sleight of hand.

The plot revolves around Harry (Webb) and Karl (Mitchell), a pair of stage magicians who once enjoyed considerable success. Their illusion-filled friendship takes a tragicomic turn when an onstage mishap during the "guillotine" trick goes awfully wrong, leading to the death of Harry's wife and their comedic partnership's untimely end. Years later, each man is trying to regain his former glory in the world of minor celebrity, performing tricks at civic functions and hosting trivia nights.

Beyond their separate lives, Harry and Karl find themselves unknowingly competing against each other when they enter the same magic contest, a prestigious competition awarding a massive cash prize and guaranteeing a spot on prime time television. Their determination to win the contest sets them up on a path of ridiculous attempts of sabotage, weird and wacky magic tricks, and a seemingly endless series of comedic mishaps.

The two performers are joined by an excellent cast. Sarah Hadland plays Linda, a promotional assistant at a company making magic props and Harry's love interest. Her subtle expressions and humorous lines skillfully add another layer of comedy to the narrative. Meanwhile, Jessica Hynes plays Otto's assistant and Karl's love interest, Dani.

The screenplay, written by Jesse Armstrong and Sam Bain, the brains behind the popular British sitcom 'Peep Show,' uses magic as a backdrop to entertain viewers while delving into themes of ambition, friendship, rivalry, and the endless pursuit of fame. The film is packed with dry humor and nods to popular stage magicians, a heaven for magic enthusiasts and fans of smart comedy.

Director Andrew O’Connor, who himself is a magician and former presenter of magic shows, brings an unmistakable authenticity to the movie. He co-creates a world that lies somewhere between our own reality and a surreal place where the laws of physics can be broken at a moment’s notice. O’Connor’s direction brings the severely under-represented magician comedy genre back into the spotlight.

Robert Webb as Harry and David Mitchell as Karl showcase the chemistry they have been known for, providing non-stop laughter throughout the film. The charm of the film resides in their interactions, as the characters deal with the hostility towards each other while slowly understanding their mistakes and realizing their friendship’s importance.

The supporting cast members deliver equally notable performances, bolstering the zany comedy with their unique character quirks. Armstrong’s and Bain’s clever writing shines through in every character, using both one-liners and physical comedy to bring countless moments of hilarity.

Magicians also throws light on the rivalry that sometimes arises in entertainment industries - sometimes laughable, sometimes dangerous, sometimes absurd, but always poignant. The magic in the movie is made even more enjoyable with the comedically dark twists added to the performance mishaps. The tricks performed are authentic, enhancing the movie's realism and plausibility.

In conclusion, Magicians is a comedic goldmine of a film – sharp, fast-paced, and laugh-out-loud funny from start to finish. Whether you're a fan of Mitchell and Webb, a lover of magic, or merely in the mood for a high-quality British comedy, there's plenty to enjoy in this entertaining flick. It showcases the perfect blend of comedy, camaraderie, rivalry, and magic tricks that keep the viewers engaged from the get-go. The movie's clever blend of real stage magic with its metaphoric use of illusion and deceit creates an intelligent and delightful comedy film that's fun to watch and rewatch.