Princes Harry (L) and William say they've established an office to look after their activities.
Princes William and Harry say they have been granted their own royal "household" by their grandmother, Queen Elizabeth II.
While called a household, it isn't where the princes live. Having a household means having a staff who support royal family members in their public duties and private lives.
Previously, William and Harry's affairs had been handled by Prince Charles' office at Clarence House in central London.
But they released a statement on Tuesday announcing they'd established their own office to look after their public, military and charitable activities.
It's located at nearby St James's Palace.
Other royals with their own households include the Queen and her husband, Prince Philip, and their other son, Prince Andrew.