Pippa Middleton not engaged to Nico Jackson

LONDON, Sept. 3 (UPI) -- Party planner Pippa Middleton, the sister-in-law of Britain's Prince William, is not engaged to her stockbroker beau Nico Jackson, UsMagazine.com said.

Middleton, 29, and Jackson, 35, have been dating at least six months.

Rumors began swirling during the weekend that the couple are making wedding plans, however, UsMagazine.com cited unnamed sources as saying the buzz isn't true.

Middleton's sister Kate married Prince William in April 2011 and gave birth to their first child, Prince George, in July.