Pippa Middleton -- the sister of the Duchess of Cambridge, Kate Middleton -- was surprised by a "romantic and grand" proposal from boyfriend Nico Jackson during their vacation to the luxury Oberoi Amarvilas resort in India earlier this month.
A source told Us Weekly magazine: "It was exactly how he planned it. Very romantic and grand."
The couple -- who have been dating for 15 months -- have been celebrating their good news in private and are looking forward to a family Christmas before heading off on another trip, skiing in the Alps.
It was previously claimed that Pippa, 30, and Nico, 36, plan to marry in Scotland.
A source said recently: "A wedding in London would never compare to her sister Kate's of course, and the prospect of erecting a marquee at her parents' house in Bucklebury for a party after the wedding service would be too low-key for her tastes these days."
There was some talk of Pippa hunting out suitable wedding venues on her next trip to Scotland. Nico loves the country too -- he thinks it's beautiful -- but when it comes to wedding planning he'll leave that to Pippa. He will go along with whatever she wants. And what she wants at the moment is a wedding in the Scottish Highlands.
"Nico would love a honeymoon in the Caribbean and a great bachelor party."
Pippa attracted the attention of the world when she was the maid of honour at the wedding of her sister, Kate, to heir-to-the-throne Prince William on April 29, 2011.
Pippa wowed in a white figure-hugging dress - designed by Sarah Burton of Alexander McQueen.
