Twenty years after its release, a recent study claims that Back to the Future was the perfect family film.

The movie, starring Michael J Fox, had the perfect ingredients for family viewing, researchers found.

Comedy was voted the most important ingredient by 40% of families. Adventure and romance were joint second with 15% each.

The Harry Potter films came second on the list, followed by Home Alone and The Goonies. (article, Back to the Future site)