Moomins and the Comet Chase (Finnish: Muumi ja punainen pyrstötähti) is a 2010 stop motion film compiled from the Comet in Moominland-based episodes of the 1977–1982 Moomins TV series animated at Se-ma-for in Poland, restored and re-soundtracked with multiple voice actors replacing the single narrator. It is the second such Moomin film produced by Finnish children's film company Filmkompaniet, the first being Moomin and Midsummer Madness, and the first one converted to stereoscopic 3-D. A similar revision of the remainder of the series for high-definition television of all 78 episodes followed the same year, as well as another film Moomins and the Winter Wonderland in 2017.
International version of the film features the voices of known Swedish actors like Stellan Skarsgård, Peter Stormare and Alexander Skarsgård. Musician and Moomin fan Björk also provided an original song, The Comet Song, for the film.
The international debut was at the Cannes Film Festival in May 2010. In Finland, it arrived in movie theaters on 6 August 2010 and would later be broadcast on the MTV3 channel. The film was also produced in dozens of other languages and subsequently received global distribution.