Carey Mulligan got the opportunity to wear lavish jewelry on the set of The Great Gatsby, but in return, she was followed closely by security guards.

The actress, who plays Daisy Buchanan in the movie opposite Leonardo DiCaprio and Tobey Maguire.

“I would be doing a scene, wearing these fabulous jewels from Tiffany's worth many, many millions,” she said, Monsters and Critics reports.

“There'd be diamond bracelets on each arm, and diamond earrings, and rings, and strings of pearls around my neck. And I could see this guy in the corner watching me intently, in case I ran off with anything.”

She also said of the actors’ behavior off set while filming that “Leo set the tone and we all followed.” They were all ordered to eat healthy and look fit.

“I had to feel as healthy as I could, because I had to look good in those dresses. I went to the gym, and ate well,” she said. “We were a healthy pack of actors. Leo and Tobey kept themselves fit. In character, we were all drinking Moet; but off the set we behaved ourselves and were strait-laced in Sydney.”

“There was the odd barbecue, but no partying around and going crazy. Leo set the tone and we all followed. Healthy was the key word.”

MSN reports that DiCaprio told Extra he was taking a little time off acting so he can "do other things.”