Credit: Dave Hogan/Getty Images

Jennifer Lawrence is going for gold!

At the Hunger Games premiere in London Wednesday, the star, who portrays Katniss Everdeen in the book series, sparkled out on the red carpet in her second gilded dress this week.

The 21-year-old donned a one-of-a-kind Ralph Lauren halter gown accented with a black band around her waist. The custom creation required over 800 hours of hand beading to achieve the stunning crocodile-skin pattern.

As the Kentucky-native is gearing up for major stardom (The Hunger Games opens in theaters March 23), she is already making herself a positive role model for young girls.

"[I'm] so sick of these young girls with diets…I think it's really important for girls to have people to look up to and to feel good about themselves," Lawrence tells the April issue of Seventeen.

For much more on the movie, including 125 gorgeous photos and exclusive interviews, pick up Us Weekly's Hunger Games special -- available on newsstands now. Order it today!