British actress Keira Knightley is finding filming on new Disney blockbuster Pirates Of The Caribbean harder work than she'd expected.

Knightley jumped at the chance to act opposite Johnny Depp and LORD OF THE RINGS-star Orlando Bloom in the big screen treatment of the Disneyland attraction.

But she is finding the character more of a challenge than she thought it would be.

BEND IT LIKE BECKHAM star Knightley says, "When I read the script, it seemed all my character did was wear great costumes, cower in a corner and get saved by Johnny Depp and kiss Orlando.

"It sounded really great and really easy. Suddenly I found myself doing all these fight scenes.

"I would do my fight scene with a stunt person and then repeat it without them there, so the computer people could eventually add the special effects."