Andy Burnham is officially Britain’s new prime minister.

Burnham formally accepted an invitation from King Charles III to form a government.

Buckingham Palace has released a photo of the two men shaking hands. The ceremony known as “kissing hands” marks the transfer of power from former leader Keir Starmer to Burnham.

Burnham replaced Starmer as leader of the center-left governing Labour Party last week.

Burnham is the seventh U.K. prime minister since 2016 in a now well-rehearsed handover after replacing Starmer as leader of the centre-left governing Labour Party on Friday.