South Park fans have spotted a brilliant Easter Egg (Picture: Warner Bros)

South Park film Bigger Longer & Uncut might have been released over 20 years ago, but that’s not stopped fans from losing it over an Easter egg this week.

Eagle-eyed viewers of the 1999 film, which brought the long-running, filthy Comedy Central animation to the big screen, have recently waxed lyrical on a blink-and-you’ll-miss it moment not long into the feature film.