Filming Helm's Deep battle was challenging for Orlando

Orlando Bloom says he found filming the climactic battle in the second Lord Of The Rings movie very demanding.

He says the scene in The Two Towers was one of the hardest in the trilogy.

The battle of Helm's Deep takes place towards the end of the second film.

Bloom, who plays the elf Legolas, tells www.scifi.com the battle takes place in the pouring rain.

"When it's overcast and raining, that just heightens all the dramatic tension," he says.

"That was nine weeks of night shoots that pretty much broke most of us. It was physically very demanding. We were filming it on a quarry, so just the uneven ground was a challenge, and it was nights."