Pippa Middleton and boyfriend Nico Jackson are reportedly getting engaged and planning their wedding. Meanwhile, Kate Middleton is "happy" for her sister.

"Kate is so happy for Pippa and she loves Nico. They all get along so well!" the source told Life & Style magazine.

Reportedly, the Duchess of Cambridge, who just welcomed baby no. 2, helped Nico Jackson choose the engagement ring.

"It will definitely be a stunner," the source said of the engagement ring to be given to 31-year-old Pippa Middleton.

The Irish Independent reported that Nico Jackson is ready to propose to Pippa Middleton.

"It's only fitting that Pippa's personal life would match her professional success as she has been enjoying yet another new career direction as she embarks on a nutrition course," it said. "She has signed up her royal sister to a fresh juice delivery service and working on green smoothies for toddler nephew Prince George."

Pippa Middleton and boyfriend Nico Jackson have been dating for three years now, and the engagement rumors came on the heels of the report that they have broken up after he move on a new job overseas.

Also last month, the socialite party planner was caught on a night out with her ex-boyfriend James Matthews in Soho in London.

Pippa Middleton being caught with ex-boyfriend James Matthews came on the heels of the rumors that she has broken up with Nico Jackson who left London for Geneva.

According to Grazia magazine, as shared by Independent, their busy schedules have been the most pressing issue between Pippa Middleton and boyfriend Nico Jackson.

"Long distance has been tough on them. It's difficult to find time for one another and Nico seems to be getting fed up with it all," the source said.

In the middle of last year, Pippa Middleton's boyfriend reportedly left a job in London to join Jabre Capital in Geneva as a stockbroker.