Hayden Panettiere at the A/X Watch launch

Hayden Panettiere and a host of other A-list celebs checked out the new line of Armani Exchange watches at the SLS Hotel in Los Angeles.

Hayden arrived in a Burberry trench coat and waved briefly to reporters.

Inside the hotel, Hayden took the coat off to reveal a short green off-shoulder dress that made her look fresh and ready for something new. She wore her hair down and smiled demurely for the camera. And, tell me if I’m wrong, but I think she lost a little weight!

Hayden displayed her A/X Prism Bracelet Watch ($160), like below. It’s a beautiful, chunky watch that’s both feminine and bold.

Image: armaniexchange.com