Prince Charles is celebrating his 70th birthday in the most special way!
The future monarch has released private family portraits of his sons to be included in a palace exhibit later this year.
The sketches - some of which have never been seen before - were created during the formal portrait process. Included in the special collection are preparatory oil sketches of Prince William and Prince Harry, created by Nikky Phillips as she painted Charles' sons for their first portrait together in 2009. aq
The oil paintings usually hang on the walls of Highgrove, the private residence of Charles, 69, and Camilla, Duchess of Cornwall, and will go on public display for the first time during the summer opening of Buckingham Palace in a special exhibit called Prince & Patron.
The royal will also display an oil sketch of his late grandmother, Queen Elizabeth, the Queen Mother by Michael Noakes as he prepared a painting to mark the silver wedding anniversary of Queen Elizabeth and Prince Philip, the Duke of Edinburgh, in 1972.
This year, Buckingham Palace will be open from July 21 to September 30, and will centre around the theme of Prince Charles 70th birthday.