Prince Harry is joining a team of wounded servicemen trekking to the North Pole.
The third-in-line to the throne will arrive at the group's base camp in northern Norway on Tuesday.
He will complete three days of training before heading out into the frozen wasteland on Friday.
Harry will be with the group for the first five days of the trek, which is expected to take four weeks and cover up to 200 miles.
The expedition is in aid of Walking with the Wounded, a charity of which Harry is patron.