7: The number of children that he has. He has four children with Victoria (Kitty, Eliza, Amelia, and Louis), two children with Caroline (Edmund and Lara), and one with Karen (Charlotte). 9: The number of years that he spent as an on-air correspondent for NBC News. 15: The number of years that had passed after Diana's death when he chose his fifth daughter's middle name in his sister's honour. 15: The number of years that he has hosted the annual Althorp Literary Festival. Image Source: Getty / David Buchan