Kate, Duchess of Cambridge, left, walks with Prince William prior to meeting with Royal British Legion and London Poppy Day appeal staff and volunteers at Kensington Palace in London on Nov. 7, 2013. The couple surprised hundreds of commuters as they joined poppy sellers at a London Tube station, after traveling there by bus.
Prince William and Kate, Duchess of Cambridge, prepare to meet staff and volunteers from the Royal British Legions London Poppy Day Appeal at Kensington Palace in London on Nov. 7, 2013.
Kate, Duchess of Cambridge, walks prior to meeting with Royal British Legion and London Poppy Day Appeal staff and volunteers at Kensington Palace in London on Nov. 7, 2013.
Britain's Prince William, Duke of Cambridge, right, meets with young volunteers from the Royal British Legion's London Poppy Day Appeal at Kensington Palace, in London on Nov. 7, 2013.
Kate, Duchess of Cambridge, meets military personnel, staff and volunteers from the Royal British Legion's London Poppy Day Appeal at Kensington Palace in central London on Nov. 7, 2013.
Kate, Duchess of Cambridge, center, meets with military personnel, staff and volunteers from the Royal British Legion's London Poppy Day Appeal at Kensington Palace in London on Nov. 7, 2013.
Prince William, left, and Kate, Duchess of Cambridge, third right, ride with television personality Barbara Windsor, second right, on a 1960's Routemaster bus as they go to meet London Poppy Day staff and volunteers in London on Nov. 7, 2013.
Britain's Prince William rides on a 1960s Routemaster bus, on route to meeting London Poppy Day staff and volunteers, in London on Nov. 7, 2013.
Kate, Duchess of Cambridge, center, rides with television personality Barbara Windsor, second right and journalist Alastair Stewart, right, on a 1960's Routemaster bus to meet London Poppy Day staff and volunteers in London on Nov. 7, 2013.
Prince William, left, and Kate, Duchess of Cambridge, second right, ride with television personality Barbara Windsor, right, on a 1960s Routemaster bus as they meet London Poppy Day staff and volunteers in London on Nov. 7, 2013.
Kate, Duchess of Cambridge, jumps off a 1960's Routemaster bus during a meeting with The Royal British Legion's London Poppy Day Appeal staff and volunteers at Kensington High Street station on Nov. 7, 2013, in London.
Kate, Duchess of Cambridge, meets military personnel during The Royal British Legion's London Poppy Day Appeal at Kensington High Street Station on Nov. 7, 2013, in London.
Prince William and Kate, Duchess of Cambridge, background, meet with military personnel, staff and volunteers from the Royal British Legion's London Poppy Day Appeal at Kensington High Street station in central London on Nov. 7, 2013.
Kate, Duchess of Cambridge, meets military personnel at Kensington High Street Station as she meet staff and volunteers from The Royal British Legion's London Poppy Day Appeal on Nov. 07, 2013, in London.
Kate, Duchess of Cambridge, left, speaks with an unidentified member of the Royal British Legion at Kensington High Street Station in London on Nov. 7, 2013.