Buckingham Palace on Friday released a new photo of King Charles III.
The photo shows Charles at work inside the palace, going through documents from the red box, the locked box that contains important paperwork and briefing papers for Britain's monarch.
The red box travels to the monarch wherever they are in residence.
The royal family remains in its official period of mourning, which will last until Monday, one week after the queen's funeral.
Charles and his wife Camilla, the Queen Consort, reportedly traveled to Scotland following the queen's funeral.
Other members of the royal family have also remained largely out of the spotlight during the mourning period, attending only a limited number of engagements to thank people who helped with the queen's funeral.
The palace has not yet announced a date for Charles's coronation, which could be months away.
The queen's coronation, for example, took place on June 2, 1953, over one year after she ascended to the throne upon her father's death.
Charles is expected to be crowned at Westminster Abbey, where each coronation has taken place for the last 900 years, according to the royal family's website.