Kathleen Elizabeth Hilton (née Avanzino; born March 13, 1959) is an American socialite, fashion designer, actress, and television personality. She is the mother of socialite Paris Hilton and fashion designer Nicky Hilton and the half-sister of The Real Housewives of Beverly Hills stars Kim Richards and Kyle Richards. Since 2011, Hilton has also appeared on that series in regular guest and recurring appearances.