We know Prince Harry's nickname for her is ‘commando' after rumours that she wore no knickers to her sister's wedding.
But since then, Wills little brother's attachment to Pippa Middleton, 27, has been hotting up even more.
So much so, Now can reveal Harry, 26,'s planning to ask her to be his official ‘plus one' at his cousin Zara Phillips' wedding on 30 July.
‘Harry's life has been thrown into chaos since his recent split with Chelsy Davy and Pippa's been a real rock for him,' says a friend.
‘She's relaxed in his presence and she's good fun, so they've become very close.
'They've met up several times and text each other a lot.
'They're both in a similar place, as the Royal Wedding brought them a lot of attention and they're regarded as two of the most eligible people on the planet.'
Read the full story about Prince Harry and Pippa Middleton in Now magazine dated 4 July 2011 - out now!Where to next