Their rapport during the royal wedding fascinated onlookers.
Since then Prince Harry and Pippa Middleton are reported to have become close.
The pair are said to have had several meetings since April, including a two-hour chat in The Troubadour pub in Chelsea.
Pippa apparently even has a nickname for the Prince. She calls him “Captain”, in a reference to his military rank.
Harry, who is single following his split from Chelsy Davy, reportedly ended his best man’s speech with the line: “Pippa, call me.”.
Pippa is also thought to be single. She hasn't been seen recently with Alex Loudon, the financier she was dating earlier in the year.
And a royal insider told Grazia the couple have been helping each other through their break-ups.
"They speak on the phone all the time and have met up at least five times since the wedding, once for tea at his Clarence House apartments.
"She thinks he’s got a really cheeky sense of humour."
Photo: © Rex