-Mario Testino, 60, is to take the official photos at Charlotte's christening
-Famously photographed Princess Diana shortly before her death in 1997
-Also took the engagement portrait for the Duke and Duchess of Cambridge
-Has since taken official photographs of Charles, Harry and Camilla
-Princess Charlotte will be christened on Sunday in Sandringham
By RUTH STYLES FOR MAILONLINE
PUBLISHED: 16:15 GMT, 30 June 2015 | UPDATED: 17:50 GMT, 30 June 2015
He was the man behind the Duke and Duchess of Cambridge's 2010 engagement photo and now Mario Testino is to take the official portrait at Princess Charlotte's christening.
The news, which was announced by Kensington Palace today, is the latest sign of royal approval for the fashion veteran who has al...