Article continues below advertisementKathy Hilton knows how to make an entrance. The 66-year-old socialite stunned fans after posting a glamorous anniversary photo with husband Rick Hilton, turning a simple date night into a full-on fashion moment.Article continues below advertisementSource: @kathyhilton/InstagramKathy Hilton stunned in a plunging black dress on her anniversary.Article continues below advertisementIn the shot, Kathy stood beside Rick in a plunging black lace mini dress that highlighted her figure and long legs.