Alan Rickman filming 'Snow Cake'

Sigourney Weaver (Imaginary Heroes) and Alan Rickman (Harry Potter), who together starred in 1999's sci-fi comedy Galaxy Quest, have joined director Marc Evans' Snow Cake, according to Production Weekly.

Set in the middle of winter in Wawa, Ontario, Snow Cake is an engaging and original story which explores the odd friendship between a high-functioning autistic woman named Linda and Alan, a quiet, brooding man traumatized after being involved in a fatal car accident. Alan comes into Linda's life following a personal twist of fate.

The quirky drama will start shooting next month in Canada.