Willis planning a wedding?

Bruce Willis is set to wed again after he and his girlfriend of eight months were spotted shopping for engagement rings.

The movie star treated model girlfriend Emma Heming to a ring shop at Cartier in Beverly Hills on September 30, according to US magazine Life & Style.

And the pair hovered around the engagement rings, according to a witness, who tells the publication: "Emma seemed to like one that had a very art deco feel to it... It was a smaller diamond set in platinum, and it was very feminine and unique."

Willis, who is 23 years older than his girlfriend, was previously married to Demi Moore.