Following her sailing lesson at the Portsmouth docks [1], Kate Middleton was spotted heading back to London on Friday evening. The duchess kept things casual [2] in a black sweater, jeans, and sneakers and was all smiles as she spoke with onlookers nearby. Needless to say, Kate looks good in just about anything [3]. Just last week, she helped Queen Elizabeth II wrap up her 90th birthday celebrations [4] at the Royal Windsor Horse Show before putting her boxing skills to the test [5] at a charity event, where she further proved that she's not too princessy to play sports [6]. See more of Kate's casual outing, then find out what's on her calendar for next month [7].