**Shaun the Sheep: The Beast of Mossy Bottom** opened in theaters on September 18, 2026, to strong critical acclaim that has quickly solidified its Tomatometer position. Aardman’s stop-motion style and signature slapstick continue to earn praise from reviewers at Empire, Variety, and Little White Lies, who highlight the film’s charming Halloween premise, inventive gags, and family-friendly tone without major missteps. The third Shaun feature joins its predecessors in maintaining the franchise’s near-perfect critical track record, with early screenings posting 100% scores before settling near 98% after wider reviews. Traders are watching for any late shifts from additional critic notices or audience Popcornmeter movement, though the consistent Aardman pedigree and positive precursor buzz suggest limited downside risk in the near term.