Yesterday, the Academy of Motion Picture Arts and Sciences announced its nominations for the 85th Academy Awards.

Now that Oscar season has officially begun, however, it seems only right to take a look back at some of the films that weren't treated as well by the Academy in the past.

Best Picture is the ultimate Oscar prize, the one every movie is trying to get. But many of the films that we consider some of the greatest in cinematic history not only didn't win this prize: they were never even nominated.

Some classic movies snubbed by the Academy include O Brother, Where Art Thou? (2000), Malcolm X (1992), Sophie's Choice (1982), and Eternal Sunshine of the Spotless Mind (2004).

But fifteen films are regarded as such classics, and were in some cases so egregiously ignored, that they warrent a place on a list of some of the worst Best Picture snubs in Oscar history.

These include such iconic films as Rear Window (1954), 2001: A Space Odyssey (1968) and even King Kong (1933).

This list is not meant to imply that choosing Best Picture nominees is easy. Far from it.

But with so many excellent movie overlooked or overshadowed due to their genre, their controversy or simply the competition that year at the Oscars, acknowledging these now-classic films is a way of honoring the beauty of hindsight.

Click through our slideshow to see the fifteen worst Best Picture snubs in Academy Awards history, and to find out who won the Oscar (and who was nominated) instead. Enjoy, and happy viewing!

King Kong 1933
King Kong (1933) King Kong Still
Rear Window 1954
Rear Window (1954) Rear Window Still
Breakfast at Tiffanys 1961
Breakfast at Tiffany’s (1961) Breakfast at Tiffany’s Still
Psycho 1960
Psycho (1960) Psycho Still
Cool Hand Luke 1967
Cool Hand Luke (1967) Cool Hand Luke Still
Empire Strikes Back 1980
Empire Strikes Back (1980) Empire Strikes Back Still
Rebel Without a Cause 1955
Rebel Without a Cause (1955) Rebel Without a Cause Still
Rosemarys Baby 1968
Rosemary’s Baby (1968) Rosemary’s Baby Poster
2001 Space Odyssey 1968
2001: Space Odyssey (1968) 2001: Space Odyssey Poster
Some Like It Hot 1959
Some Like It Hot (1959) Some Like It Hot Poster
North By Northwest 1959
North By Northwest (1959) North By Northwest Still
Blade Runner 1982
Blade Runner (1982) Blade Runner Poster
Manhattan 1979
Manhattan (1979) Manhattan Still
Singin in the Rain 1952
Singin’ in the Rain (1952) Singin’ in the Rain Poster
Do the Right Thing 1989
Do the Right Thing (1989) Do the Right Thing Poster
Academy of motion picture arts and sciences Oscars