The Bishop's Wife is a delightful lesser-known Christmas film from 1947 which we picked up on DVD last year but didn't watch 'til tonight. Cary Grant makes a perfect angel, while David Niven and Loretta Young are also perfect as the worried bishop trying to flatter wealthy parishioners into donating money enough to build a cathedral and his neglected wife. Elsa Lancaster plays the housekeeper.
Here's the opening scene:
The Husband suggested this one this afternoon, so he and I watched it. I haven't seen this one very many times and we just bought it year before last, but I like it a lot. It's online in 12 parts at youtube with embedding disabled. Links: (removed as of 12/1/2009)
TCM has an overview. Variety has a short review. The New York Times review says "it comes very close to being the most enchanting picture of the year" and calls it a "warm and winning fable".