Prince William and Kate Middleton stepped out of the St. Giles cathedral in Edinburgh today. They were in Scotland for the Thistle Ceremony to install William as a Knight in the Order of the Thistle. The honor is Scotland's highest and comes during the queen's four-day Diamond Jubilee tour of the country. Kate wore a yellow Emilia Wickstead for the event, which was just her latest public appearance. Kate and William attended Wimbledon yesterday to watch Roger Federer's victory over Mikhail Youzhny from the royal box. Just last week Kate's siblings, Pippa and James, sat in the special section, as did their mother, Carole.