Red Cliff
The actual siege happens at the end, but the battle scenes are still frickin epic. And great acting.
I think The Warlords might also have some siege, but that might be more single-combat Jet Li style. Been a while since I've seen it. posted by jmd82 at 6:01 PM on February 9
Ironclad
Throne of Blood and/or Ran
The Big Red One (WW2 attack on Monte Cassino)
And if it doesn't have to be historical:
LOTR (TT and ROTK)
Army of Darkness
Willow
Game of Thrones (particularly the last 2 eps of S2) posted by zombieflanders at 5:33 AM on February 10
We Were Soldiers.
Assault on Precinct 13 has a smaller focus but a siege theme.
55 Days at Peking (note that it's pretty dated in its view of the Chinese and the cause of the Boxer Rebellion and the siege of the legations.)
There have been a few movies made about the siege of the Alamo, but I am not a fan of any of them particularly.
posted by gudrun at 4:18 PM on February 9