What is your favourite movie of all time?

[Shortie]

Movies are something I used to love watching as a kid but nowadays, I am cautious as to what movies I watch now that I am older as I have watched movies in the past that have been a huge letdown. 
When I was growing though I loved movies like Chitty Chitty Bang Bang and Mary Poppins and one of my favorite movies was Dirty Dancing as well. I still love watching Dirty Dancing when I am in the mood to. 
What is your favorite movie of all time?