Pippa Middleton is reportedly dating Made In Chelsea's Spencer Matthews' brother, James.

The 29 year-old was spotted with the reality star's brother (37) on a number of occasions during the past month. The pair enjoyed tennis together at an exclusive club in Kensington, while they were also spotted dining recently in Mayfair.

Middleton split from her long-term boyfriend of three-years, City banker Alex Loudon, in 2011.

The Duchess of Cambridge's sibling last week released her guide book to throwing a successful party, entitled Celebrate: A Year of British Festivities for Family and Friends.