Kate Middleton looked all kinds of gorgeous when she stepped out for the annual Portrait Gala in London on Tuesday. Kate — who has been a patron of the gallery since 2012 — stunned in a emerald green gown complete with a metallic clutch. The Duchess of Cambridge met with guests and viewed two exhibitions — Howard Hodgkin: Absent Friends and Gillian Wearing and Claude Cahun: Behind the Mask, Another Mask — before attending a dinner at the art gallery. Kate attended the event solo, and has been keeping busy with her philanthropic endeavors following Prince William’s controversial ski trip to the Swiss Alps in early March. After celebrating St. Patrick’s Day with a cold glass of Guinness during a visit to the Cavalry Barracks, she helped spread mental health awareness the day after the London terrorist attack.