Pippa Middleton
Pippa Middleton, the sister of Britain's Catherine, Duchess of Cambridge, watches the women's singles tennis match between Angelique Kerber of Germany and Heather Watson of Britain at the Wimbledon Tennis Championships, in centre court, London.Reuters

Pippa Middleton became an overnight celebrity following her sister Kate Middleton's wedding to Prince William three years ago. But that has not changed her relationship with her sibling, the columnist told Today's Matt Lauer in her first television interview.

The 30-year-old was thrust into limelight after her pert backside in the Alexander McQueen gown became the topic of many discussions worldwide. Although Pippa was flattered by the attention, she still does not see what they hype is all about.

"It was completely unexpected," she said of the attention her bum-hugging gown received. "You know, I think the plan was not really for it to be a significant dress. Really just to sort of blend in with the train."

"I suppose it's flattering," she said, adding that there are times when she has felt publicly bullied, especially when she reads about stuff that aren't true.

The gown is still hanging in her closet at home, and Pippa has no intention of bringing it out anytime soon.

"But I think I'll just keep it there...I think it's the sort of thing that I'm sure I'll bring out if someone wanted to see it or my children one day want to see it. Then I'll show them," Pippa said.

Like any other siblings, Pippa and Kate still value each other's opinion and nothing much has changed in their relationship now that Kate is royalty, Pippa said, adding that they still find time for girl talks.

"I mean, obviously she has pressures that she's taken on and things. But we spend a lot of time together. We still do a lot together as a family," she said. "We have a very normal, sisterly relationship. We're very close. And, you know, we support each other and get each other's opinions and things."

Elaborating on her future plans, Pippa said she would one day want to start her own family, and interacting with Prince George has only heightened her desire to have babies. "He's amazing. He's a very dear boy. And he's brought a lot of pleasure and fun for all of us, the whole family."

However, her immediate focus is to further her writing career. Pippa is currently working as a contributing editor for Vanity Fair and a food columnist for the British Waitrose Kitchen magazine.