The Duchess of Cambridge Kate Middleton's little sister Pippa Middleton was spotted out in Chelsea on Wednesday morning in an outfit that would be considered dressed up if it wasn't for her addition of sneakers.

Although boyfriend Nico Jackson was nowhere in sight the socialite looked happy as she walked down the street with her dark peplum skirt paired with a white skirt and grey and white Converse All Star sneakers as she strolled along Kings Road.

Middleton checked her iPhone as she went unnoticed by many passers-by, according to the Daily Mail. Prince William's sister-in-law hid behind her dark sunglasses before taking them off as she entered the shade.

Maybe the socialite was all smiles because she is reportedly engaged to her stockbroker boyfriend Nico Jackson.

[For photos of Pippa Middleton on her day out and of her date night with Nico Jackson click HERE]

Although she has dated a long line of aristocratic men according to her friends Middleton has said that Jackson is "the one."

The Daily Mail reported that Pippa Middleton and Nico Jackson are expected to announce their engagement within months. Friends close to the socialite said that she has chosen to delay the news out of respect for her sister Kate who just gave birth to royal baby Prince George last month.

The 29-year-old doesn't want to still the spotlight from her big sister and nephew.

Back in July, a friend of Middleton and Jackson said, "An engagement is definitely on the cards."

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