Irish actor Cillian Murphy has slammed the paparazzi for stalking his co-stars Keira Knightley and Sienna Miller on the U.K. set of their forthcoming movie The Edge Of Love.

The star claims the actresses were harassed daily by the British press - and admits watching the photographers' behaviour made him feel uncomfortable.

He tells Britain's Harper's Bazaar magazine, "It's not a pleasant thing to witness happening to such cool girls, and it makes it very hard for them to concentrate on their job.

"I totally admire them for putting up with it - if I walked out of my house every morning and there were 15 men waiting to photograph me, I couldn't do it."