Princess Kate participated in a beloved St. Patrick's Day tradition Monday after missing the event last year due to health issues. Kate attended the Irish Guards' annual St. Patrick's Day parade Monday in London, an event she's attended regularly since 2012, making her absence at last year's parade stand out.

Kate Middleton certainly knows how to make an entrance. Not only does she steal the show with her chic fashion looks, but her hair is also styled to perfection—whether it's defined waves or a pin-straight blow-out.

Kate Middleton married Prince William on April 29, 2011 at Westminster Abbey in London. During a documentary called William & Kate: The Journey, royal expert Ashley Pearson opened up about the incredibly old tradition the Princess of Wales broke on her wedding day.