Blake Lively feels "lucky to have a good metabolism."

The 24-year-old actress is in great shape.

Blake works out when she needs to, but the stunning star prefers eating to exercise.

"I'm really lucky to have a good metabolism," Blake told OK! magazine at the Jason Wu for Target launch party in New York City Thursday night. "When I have to get in shape for a movie then I can do it, I only had to do it once but I just love to cook a lot. And I think I use a lot of fresh produce, maybe that helps?"

Blake is inspired to eat well so that she can wear her favourite clothes. The actress can't wait to begin donning spring fashions.

"I'll probably be in a lot of high waisted mini skirts and shorts [in spring]," Blake shared.

The actress felt honoured to support her friend fashion designer Jason Wu on the launch of his new line with American retailer Target.

Blake and Jason knew one another before they both shot to stardom.

"I'm such a fan of his, and I have been for so long," Blake gushed. "We were talking about how when we first met, Gossip Girl had just aired and it was before he dressed Michelle Obama. So we were both young and new to all of this and very naive, and to be here now and see what our journey's been for the last three years. We're both so lucky we've been pinching ourselves thinking, 'How cool is this?' But it's nice to have that camaraderie and also his lines are so beautiful. I appreciate the sophistication."