Hollywood actress Sienna Miller loved playing the baddie in her role as 'The Baroness' in 'GI Joe: The Rise of the Cobra' because she got to indulge in her villainous side.

"The script was brilliant, the role was brilliant. She's a proper villain!," Miller told Total Film magazine reported.

However, Sienna said that the director Stephen Sommers initially said she wasn't tall enough to make the role a success.

"I think the first thing he said to me was, 'God, you're really short! But then, of course, with the wardrobe and the make-up. I don't look like a villain when you meet me, but I do in the film," Miller said.

Despite enjoying the movie, the 27-year-old actress whose past projects include 'Camille', 'Stardust' and 'The Edge of Love' said she surprised herself when she accepting the role.

"Well, I'd always intended to do the more artistic, independent projects that often require an emotionally gruelling performance.

"But I think I got to a point where I just wanted to go and see. I'd really avoided doing anything of this magnitude before but it felt right at the time," Miller said.