Kate talks about holiday food in America, our obsession with pies, not approving of marshmallows on sweet potatoes, being an ambassador for The King's Foundation, meeting with King Charles over the summer alongside Meryl Streep and David Beckham, and directing and acting in a movie her son wrote called Goodbye June. Watch 'Jimmy Kimmel Live!' WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.