Prince Harry’s striking ginger hair comes from his mother’s side of the family, the Spencers, who carry the genetic variant that produces red hair.
How red hair is inherited
Red hair is caused by a recessive mutation in the MC1R gene on chromosome 16. Both parents must contribute a copy of the mutated gene for the trait to appear. If only one parent carries the mutation, the child will be a carrier but will not show red hair.
The Spencer side of the family
Princess Diana’s family has a long history of red hair. Her sister Lady Sarah McCorquodale is a natural redhead, and their brother Charles Spencer, 9th Earl Spencer, also has a copper‑tinged shade. The pattern shows that the MC1R mutation is common among the Spencers.
Prince Harry’s genetic combination
Charles III, Harry’s father, does not display red hair, but he can still carry a silent copy of the MC1R mutation. When he and Diana each passed a mutated copy to Harry, he received the double dose needed for the ginger phenotype.
Why other royals are not red‑haired
Most members of the House of Windsor have darker hair because the recessive ginger gene is rare on that side. The occasional carrier can pass the gene unnoticed for generations, which is why Harry’s brother William, who received only one copy, does not have red hair.
Debunking the James Hewitt rumor
Tabloids once suggested that Harry’s hair proved a different father, but the timeline shows Diana did not meet Major James Hewitt until after Harry was born. The genetic explanation fully accounts for Harry’s hair without invoking paternity speculation.
What red hair means biologically
People with the MC1R mutation often have fair skin, freckles, and a higher sensitivity to UV light. Some studies also suggest differences in pain perception, though the exact mechanisms remain under investigation.