The new King Charles III has been on the job since Sept. 8, when Queen Elizabeth II died. See a new picture of him at work with the King's Red Box.

King Charles went straight to work. In a newly released photo shared Friday, Charles is seen at a desk in Buckingham Palace with the famous red box containing documents needing his attention.

Taken in the 18th century room at Buckingham Palace last week, the photo shows Charles working from The King’s Red Box—a case containing papers for the monarch, including documents from ...

King Charles III carries out official government duties from his red box in the Eighteenth Century Room at Buckingham Palace in a new photo released Sept. 23. (Victoria Jones/PA via AP) Victoria ...

The first red mail pillar box to bear the cypher of King Charles was unveiled on Friday, keeping up a tradition dating back almost 175 years.