(digitalspy.co.uk) - Salma Hayek and her fiance have been named the richest couple in Hollywood in a poll by In Touch magazine. The actress gave birth to her first child with businessman Francis-Henri Pinault last September.Pinault is the chairman of PPR, a conglomerate which owns luxury fashion brands Gucci and Yves Saint Laurent, and is thought to be worth more than ?7 billion. The couple are rumoured to have bought Frasier star Kelsey Grammer's ?10 million estate in Bel Air, California.Other celebrities on the list include Justin Timberlake and Jessica Biel, Simon Cowell and Teri Seymour, and Jessica Simpson and American footballer Tony Romo.