Harvey, a classic from 1950. I know you'll be shocked when I mention that Jimmy Stewart is the star of the movie...what can I say? I really like his acting :-)
Basically, Harvey is a slap-stick comedy in which a grown man (Elwood P. Dowd) introduces everyone to his friend Harvey, a six foot tall rabbit. His sister, played to perfection by Josephine Hull, tries to commit him to a mental institution, and a comedy of errors ensues. Elwood and Harvey become the catalysts for a family mending its wounds and for romance blossoming in unexpected places.
Jospehine Hull won the Oscar for Best Actress in a Supporting Role, and when you watch the movie, you will totally understand why. But you'll wonder why Jimmy Stewart didn't win the Best Actor Oscar, especially when you consider he makes a huge, invisible rabbit seem real.
This movie is a lot of fun to watch. Even though it's from 1950, it's still black and white (at least in the version I have). And it has a basically feel good storyline that makes you want to suspend belief for the 100 or so minutes of the movie. It's a film the whole family can watch and enjoy together.