Was interested to read the mixed reviews of this. As the movie takes the characters out of Australia for most of the narrative, perhaps it would disappoint some viewers who like the TV series because of the local settings and local reference points. I enjoy this movie because it includes a lot of references to a wider range of things, including fairy tales, kitsch European culture, royalty, the musical comedy convention of a finale that reveals secret ancestry, and European thrillers and road movies of the 1960s (perhaps even Girl on a Motorcycle but I'm not sure if the reference is intened to be that specific). It's like a fantasy romcom/comedy of remarriage with a lot of intertextual elements. Love the silly costumes. Whether you like this might depend on your receptiveness to the silly, but at the same time I think Kath, Kim and co. are fully entitled to go international. The idea that all Australian movies should be set mainly or wholly in Australia is too limiting.
Review of Kath & Kimderella
