The Duke and Duchess of Cambridge spent their morning at a private reception at the home of producer Steve Tisch in Beverly Hills today. Kate wore a blue top and white skirt from UK brand Whistles. The event marked the launch of Tusk's US Patron's Circle and celebrity guests Catherine Keener and Linda Evangelista were on hand to show support. Kate Middleton and Reese Witherspoon talked during the bash as well! Reese expressed her excitement for the royal wedding earlier this year, just after her own nuptials to Jim Toth in April. Prince William and Kate Middleton have been mingling with many famous faces since their arrival in LA on Friday. Last night they attended the BAFTA Brits to Watch dinner and during the evening were spotted chatting with Jennifer Lopez, Jennifer Garner, Barbra Streisand, Tom Hanks, and others. William and Kate will next make a visit to Inner City Arts before finishing their California tour at the Service Nation: Mission Serve Event.