Ashley Judd's big smile (pictured) might have something to do with the ring she got from race-car driver Dario Franchitti. The antique cushion-cut diamond is in a pavé setting by Martin Katz.make.

Usually very big, very sparkly and *very* expensive ... to see the dazzling cushion-cut diamond ring, designed by Jessica McCormack, close up. Featuring the jewellery designer's signature button ...