Pippa Middleton makes rare public outing with unexpected figure -- find out who!

Where's Pippa Middleton? That's the question on everyone's minds ever since she nearly disappeared from the public eye following her May 2017 wedding.

Duchess Kate's younger sister was finally spotted out and about on Wednesday with a familiar face -- her ex-boyfriend Tom Kingston. Photographs of the two showed them in deep conversation as they walked through the streets of Chelsea. However, their relationship is strictly platonic -- Pippa is happily married to financier James Matthews while Tom is currently dating Gabriella Windsor.

The 34-year-old beauty was still sporting that post-honeymoon glow in a houndstooth Red Valentino coat, a pair of black skinny jeans and white sneakers. Her brunette tresses were down instead of in her usual ponytail and looked a tad bit longer than the shorter length she rocked months ago.

But what exactly has Pippa been doing since her wedding? According to Harpers Bazaar, Kate's little sis has been busy with her philanthropy work. Pippa has been an ambassador for the British Heart Foundation since 2014 and has recently released a cookbook, "Heartfelt," to benefit the charity.

"Creating this book has been a huge pleasure, bringing together two of my greatest passions – delicious food and an active, healthy lifestyle," Middleton said. "As an Ambassador, I care deeply about the work of the British Heart Foundation. Anything I can do to raise funds for their vital heart research is extremely important to me."

With the arrival of Kate's third baby in April, however, we're sure that there will be more Pippa sightings to come!

For more on Pippa Middleton, watch the video above.