[kabumpo]

He’s so obviously the offspring of Diana’s paramour, James Hewitt. The physical resemblance is embarrassing.

[Politicalmom]

I don’t agree. I think he looks like Diana’s brother.

[miss marmelstein]

For a long time I, too, was convinced that Harry was Hewitt’s son. But as he grows older I’ve noticed he’s starting to look vaguely like his father. I saw it clearly in one brief moment not too long ago. Time will tell, I think. People’s faces change so much over the years. And, of course, the redheadedness is on Diana’s family’s side as well.

[mnehring]

I'm usually not much on all that theory of the royal kids being from someone other than Charles, however, Harry and Hewitt's noses are almost identical and don't resemble either Charles or Diana. (neither of who are red-head either). He looks a lot like Hewitt when he was young.