Catherine, Duchess of Cambridge's socialite sister Pippa Middleton is engaged to be married, according to a U.S. report.

The event planner, who came to the attention of the global public at her sister's high-profile wedding to Prince William in 2011, has reportedly accepted a proposal from her boyfriend of 15 months, Nico Jackson.

The banker popped the question during a vacation in India earlier this month (Dec13), according to

A representative for Middleton has yet to comment on the report.