Hugh Grant and Jemima Khan Arriving at Sir David Frost's Summer Party. London, England - 05.07.06

The British NOTTING HILL star and his heiress girlfriend are determined to keep plans under wraps, and have broken the news only to a select few family and friends.

A source tells British newspaper the Sunday Mirror, "Everyone is thrilled for them. But Hugh and Jemima are not a typical celebrity couple and want to keep their wedding plans private."