The 'Twilight Saga' actress, Kristen Stewart, who was embroiled in a scandal last year when she cheated on her co-star and boyfriend Robert Pattinson with 'Snow White and the Huntsman' director Rupert Sanders - earned the dubious distinction in a poll of British men ahead of the Academy Awards on Sunday, beating the likes of Sarah Jessica Parker and Lindsay Lohan.
A spokesperson for Men's gadget website Menkind.co.uk, which conducted the poll, said: "Our Oscars poll has been a fascinating insight into the minds of British men. It's shown that sexiness is far more than appearance.
"They were turned off by volatile and moody actresses as well as ice queens. And they don't want to see unhealthily skinny starlets on the big screen."
Kristen, 22, eclipsed 'Sex and the City' star Sarah, 47, who ranked second, while troubled redhead Lindsay, 26, came third.
Elsewhere, while they may be Oscar winners, Hilary Swank and Tilda Swinton received less esteemed honours this awards season, came seventh and ninth in the poll respectively.
Other actresses to receive mentions include Denise Richards, former 'The O.C.' star Mischa Barton and Uma Thurman.
The 10 least sexy Hollywood actresses:
1. Kristen Stewart
2. Sarah Jessica Parker
3. Lindsay Lohan
4. Denise Richards
5. Kirsten Dunst
6. Mischa Barton
7. Hilary Swank
8. Lucy Liu
9. Tilda Swinton
10. Uma Thurman