Britain's Duchess of Cambridge's younger sister Pippa attended a Christmas Carol concert in London last week with her ex-boyfriend James Matthews.

Pippa Middleton

Pippa Middleton

The 32-year-old socialite was joined by her mother Carol and her former squeeze - the brother of 'Made in Chelsea's Spencer Matthews - to support Prince William at the event, held at St Luke's Church in Chelsea, last Wednesday night.

The former couple's reunion comes just after her split from her boyfriend Nico Jackson, 37, who she was tipped to be engaged to, following three years of dating.

The brunette beauty has sparked rumours she's turned to her former flame as a way to get over Nico after she was seen leaving the venue with James in a fit of giggles.

And it seems there are no hard feelings between James and Carole either as she was seen chatting to him upon her exit.

Pippa dated James briefly in 2012 but the pair have always remained friends and have been pictured together on numerous occasions over the past three years.

Meanwhile, the Christmas Carol concert was held to remember William and brother Prince Harry's old Ludgrove School classmate, Henry van Straubenzee.

William - who is good pals with Henry's older brother Thomas - are both patrons of the Henry van Straubenzee Memorial Fund, which was set up after his death in 2002.

Writing in the programme for the event, the handsome princes said: "We are both delighted to be patrons of Henry's memorial fund. Each year brings with it more news about the progress that this charity continues to make.

"This is largely down to the generosity and support of donors, many of whom are here tonight at this, the seventh Christmas carol service."