Evangeline Lilly isn't happy with having the 'Best Butt Ever'.

The former 'Lost' star appeared on the cover of Women's Health magazine with an arrow pointing to her behind, declaring it the perfect posterior, but she was upset because she wasn't aware of their intentions.

She told talk show host Conan O'Brien: ''You think I would have done the shoot if they said, 'Oh by the way, we're gonna say 'Best Butt Ever' and put a big arrow to your behind?' ''

The 34-year-old star also didn't think the cover was in good taste, saying: ''Every woman is after a sort of classy image. I didn't want T&A on my cover, it's a women's magazine. It's not [men's magazine] Maxim.''

The Canadian star also said she phoned Women's Health to complain once she saw the cover.

Meanwhile, Evangeline has said she initially wasn't sure about taking the role of elf Tauriel in new fantasy film 'The Hobbit: The Desolation of Smaug' because she knew some fans would take exception to her version of the character.

She told Entertainment Weekly magazine: ''I did have to hesitate and go, 'Whoa, people are going to hate me,' but I really couldn't refuse. It was just too good to say no to.''