The Duke and Duchess of Cambridge participated in ServiceNation: Mission Serve's hiring fair for veterans and military spouses at Sony Pictures Studios in LA this afternoon. The royal couple helped create 1,000 care packages for the sons and daughters of soon-to-be-deployed servicemen and women and showed further support at a special reception for champions of the cause. William, who is an officer in the Royal Air Force, shared a few remarks about why the organization is close to his heart, and also thanked California for receiving him and his wife with such a warm welcome. He also took the opportunity to fit in a good-natured jab at Prince Harry, referring to him as his "low-flying" Apache pilot brother. Earlier this morning Kate and William attended a private event for Tusk's US Patron's Circle in Beverly Hills, where they chatted with Reese Witherspoon. It's been a jam-packed trip to the West Coast for Kate and William, who landed in California Friday and spent yesterday in Santa Barbara. Last night, they got glamorous for the BAFTA Brits to Watch dinner and mingled with A-list stars like Tom Hanks, Jennifer Garner, and Nicole Kidman. Nicole, along with Barbra Streisand and James Brolin, was one of the lucky attendees seated at William and Kate's table during the dinner. William and Kate wrapped up their LA tour and headed back to the UK on a commercial flight following today's service event. Stay tuned for tomorrow's PopSugar Rush to see our coverage from the job fair, where we were on the scene, and to watch part of Prince William's speech!