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.

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See Kate and Pippa Middleton together at Pippa's wedding
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See Kate and Pippa Middleton together at Pippa's wedding
ENGLEFIELD GREEN, ENGLAND - MAY 20: Pippa Middleton and Catherine, Duchess of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD, ENGLAND - MAY 20: Catherine, Duchess of Cambridge, right, arranges the train of her sister of her sister Pippa Middleton as she arrives with her father Michael Middleton for her wedding to James Matthews at St Mark's Churchon May 20, 2017 in Englefield, England. Middleton, the sister of Catherine, Duchess of Cambridge is to marry hedge fund manager James Matthews in a ceremony Saturday where her niece and nephew Prince George and Princess Charlotte are in the wedding party, along with sister Kate and princes Harry and William. (Photo by Kirsty Wigglesworth - Pool/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Pippa Middleton and James Matthews smile as they are joined by Catherine, Duchess of Cambridge, right, after their wedding at St Mark's Church onMay 20, 2017 in Englefield, England(Photo by Arthur Edwards - WPA Pool/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge and Princess Charlotte of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge attends the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge attends the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Michael Middleton, Pippa Middleton and Catherine, Duchess of Cambridge attend the wedding of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by UK Press Pool/UK Press via Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Princess Charlotte of Cambridge, bridesmaid and Catherine, Duchess of Cambridge attend the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Pippa Middleton, James Matthews and Catherine, Duchess of Cambridge leave after getting married at the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
ENGLEFIELD, ENGLAND - MAY 20: Pippa Middleton and James Matthews smile after their wedding at St Mark's Church on May 20, 2017 in in Englefield, England. Middleton, the sister of Catherine, Duchess of Cambridge married hedge fund manager James Matthews in a ceremony Saturday where her niece and nephew Prince George and Princess Charlotte was in the wedding party, along with sister Kate and princes Harry and William. (Photo by Kirsty Wigglesworth - Pool/Getty Images)
ENGLEFIELD, ENGLAND - MAY 20: Catherine, Duchess of Cambridge, right, walks with the flower boys and girls, including Prince George, second right, and Princess Charlotte after the wedding of Pippa Middleton and James Matthews at St Mark's Church ion May 20, 2017 in in Englefield, England. Middleton, the sister of Catherine, Duchess of Cambridge married hedge fund manager James Matthews in a ceremony Saturday where her niece and nephew Prince George and Princess Charlotte was in the wedding party, along with sister Kate and princes Harry and William. (Photo by Kirsty Wigglesworth - Pool/Getty Images)
ENGLEFIELD, ENGLAND - MAY 20: Pippa Middleton and James Matthews smile after their wedding at St Mark's Church on May 20, 2017 in in Englefield, England. Middleton, the sister of Catherine, Duchess of Cambridge married hedge fund manager James Matthews in a ceremony Saturday where her niece and nephew Prince George and Princess Charlotte was in the wedding party, along with sister Kate and princes Harry and William. (AP Photo/Kirsty Wigglesworth, Pool)
Britain's Catherine, Duchess of Cambridge (R) stands with her children Britain's prince George (L) and Britain's princess Charlotte (2R), following the wedding of her sister Pippa Middleton to James Matthews at St Mark's Church in Englefield, west of London, on May 20, 2017. After turning heads at her sister Kate's wedding to Prince William, Pippa Middleton graduated from bridesmaid to bride on Saturday at a star-studded wedding in an English country church. Middleton married financier James Matthews, 41, at a ceremony attended by the royal couple and tennis star Roger Federer, as she wore a couture dress by British designer Giles Deacon. / AFP PHOTO / POOL / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Pippa Middleton (L) and her new husband James Matthews leave St Mark's Church in Englefield, west of London, on May 20, 2017 following their wedding ceremony. After turning heads at her sister Kate's wedding to Prince William, Pippa Middleton graduated from bridesmaid to bride on Saturday at a star-studded wedding in an English country church. The 33-year-old married financier James Matthews, 41, at a ceremony attended by the royal couple and tennis star Roger Federer, wearing a couture dress by British designer Giles Deacon. / AFP PHOTO / POOL / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
Pippa Middleton (R) kisses her new husband James Matthews, following their wedding ceremony at St Mark's Church in Englefield, west of London, on May 20, 2017. After turning heads at her sister Kate's wedding to Prince William, Pippa Middleton graduated from bridesmaid to bride on Saturday at a star-studded wedding in an English country church. The 33-year-old married financier James Matthews, 41, at a ceremony attended by the royal couple and tennis star Roger Federer, wearing a couture dress by British designer Giles Deacon. / AFP PHOTO / POOL / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Catherine, Duchess of Cambridge stands with her daughter Princess Charlotte of Cambridge, a bridesmaid, following the wedding of her sister Pippa Middleton to James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Justin Tallis - WPA Pool)
Pippa Middleton and her new husband James Matthews leave St Mark's Church in Englefield, west of London, on May 20, 2017 following their wedding ceremony. After turning heads at her sister Kate's wedding to Prince William, Pippa Middleton graduated from bridesmaid to bride on Saturday at a star-studded wedding in an English country church. Middleton, married financier James Matthews, 41, at a ceremony attended by the royal couple and tennis star Roger Federer, as she wore a couture dress by British designer Giles Deacon. / AFP PHOTO / POOL AND AFP PHOTO / Justin TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)
ENGLEFIELD GREEN, ENGLAND - MAY 20: Princess Charlotte of Cambridge, bridesmaid and Catherine, Duchess of Cambridge attend the wedding Of Pippa Middleton and James Matthews at St Mark's Church on May 20, 2017 in Englefield Green, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
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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. 

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Pippa Middleton's Wimbledon looks
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Pippa Middleton's Wimbledon looks
Tennis - Wimbledon - London, Britain - July 14, 2017 Pippa Middleton and husband James Matthews in the stands on centre court REUTERS/Toby Melville
Tennis - Wimbledon - London, Britain - July 14, 2017 Pippa Middleton and husband James Matthews in the stands on centre court REUTERS/Toby Melville
LONDON, ENGLAND - JULY 14: Pippa Middleton and James Matthews attend day 11 of Wimbledon 2017 on July 14, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 14: Pippa Middleton and husband James Matthews watch the action during the Gentlemen's Singles semi final match between Sam Querrey of The United States and Marin Cilic of Croatia on day eleven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon at Wimbledon on July 14, 2017 in London, England. (Photo by Shaun Botterill/Getty Images)
LONDON, ENGLAND - JULY 14: Pippa Middleton and husband James Matthews watch the action during the Gentlemen's Singles semi final match between Sam Querrey of The United States and Marin Cilic of Croatia on day eleven of the Wimbledon Lawn Tennis Championships at the All England Lawn Tennis and Croquet Club at Wimbledon at Wimbledon on July 14, 2017 in London, England. (Photo by Shaun Botterill/Getty Images)
LONDON, ENGLAND - JULY 14: Pippa Middleton attends day 11 of Wimbledon 2017 on July 14, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 10: Carole Middleton and Pippa Middleton attend day seven of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 10, 2017 in London, United Kingdom. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 10: Carole Middleton and Pippa Middleton attend day seven of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 10, 2017 in London, United Kingdom. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 10: Pippa Middleton attends day seven of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 10, 2017 in London, United Kingdom. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 10: Pippa Middleton (L) and guest attend day seven of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 10, 2017 in London, United Kingdom. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 10: Pippa Middleton attends day seven of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 10, 2017 in London, United Kingdom. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 05: Pippa Middleton attends day three of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club on July 5, 2017 in London, United Kingdom. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 05: Pippa Middleton seen arriving at Day 3 of Wimbledon 2017 on July 5, 2017 in London, England. (Photo by Neil Mockford/GC Images)
LONDON, ENGLAND - JULY 05: Pippa Middleton attends day 3 of Wimbledon 2017 on July 5, 2017 in London, England. (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - JULY 05: Pippa Middleton and her younger brother James Middleton (R) attend day 3 of Wimbledon 2017 on July 5, 2017 in London, England. (Photo by Karwai Tang/WireImage)
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