Prince Harry has said it is "great to be good" and "boring to be bad" in a new documentary, according to broadcaster Tom Bradby.
Harry - once dubbed the Party Prince for his rebellious antics - has made a new ITV film with Bradby about his charity work in the Aids-stricken southern African kingdom of Lesotho.
ITV News At Ten anchor and former royal reporter Bradby says the programme is a moving account of the Prince's return to the country and that Harry opens up about his own life.
Writing in the Christmas issue of Radio Times, the presenter said: "The film is also rather revealing about who he is and where he is in life.
"He talks candidly about the past, the present and his own future. But mostly he talks about how fired up he is about his position and what he can do with it.
"There is, he says, too much focus on the bad news in life.
"It's great to be good, he tells us, and boring to be bad."
He added that the Prince said he was "just literally being the ginger, white Prince who has come to try to make these kids laugh" when he first went to Lesotho on his gap year as a 19-year-old.
The programme also captures the moment Harry is reunited with Mutsu, a teenager orphaned by Aids.
They first met when Mutsu was four and have remained in regular contact.
Bradby described the relationship as "as heart-warming as anything you will see this Christmas".
Harry, who is dating actress Meghan Markle, first took part in a film about Lesotho 12 years ago, before joining the Army.
He went on to set up the charity Sentebale in memory of his mother Diana, Princess of Wales and has visited Lesotho many times. Harry flew straight from his Caribbean tour to Canada to be with Markle, The Sun reported. He had been due to head back to London, but was said to have made the 1,700-mile detour to see the actress in Toronto.
The pair last saw each other three weeks ago when the Suits star came to visit the Prince at Kensington Palace before he left for his busy 15-day overseas trip on behalf of the Queen.
The reunion will only be a brief one as 32-year-old Harry has to be back for a royal engagement in London today when he will make an appearance for broking firm ICAP's 24th annual Charity Day.
Kensington Palace declined to comment.