Pippa Middleton and her beau Nico Jackson were spotted in the crowds on Wimbledon's Centre Court on Friday afternoon.
Kate Middleton's younger sister had dressed for the sunny weather in a chic and vibrant orange stripped dress which she teamed with oversized sunglasses.
The auntie-to-be wore her sleek brunette locks loose as she cosied up to her boyfriend Nico, 35, whom she has been linked to since the beginning of the year.
The stockbrocker was dapper in chinos and a navy blazer at the south west London tennis championships.
The couple watched the action unfold between Novak Djokovic and Juan Martin Del Potro in the men's singles semi-final.
Friday's visit marks the second time that Pippa, 29, has been a spectator at Wimbledon during the past two weeks. She was there on the first day of the tournament with her brother James Middleton.
Pippa has been an avid fan of championships since she was young. As a new contributing editor for Vanity Fair, she recently wrote a column entitled Pippa Middleton's Inside Guide to Wimbledon, focusing on her experiences at the oldest tennis tournament in the world.
Her highlight, she said, was "Queuing from five am on 'People's Sunday' in 2004 with my sister for three hours, and getting £35 tickets on Centre Court; my first time ever.
"Seats were a free-for-all – and I recall almost tripping over myself trying to get as close as possible to my birthday-twin British hero Tim Henman."
The eligible brunette was first linked to Nico, 35, at the start of the year and by February the stockbroker had already been introduced to her family. He joined Pippa, Kate and Prince William as they holidayed in Mustique with her parents Michael and Carole and her brother James.
Nico's delighted mother has also given the relationship her blessing, describing Pippa as "absolutely charming".
While eligible Pippa has been linked to aristocracy in the past, Nico has a distinctly 'normal' background.
He grew up in a middle-class red-brick terraced house in Folkestone, Kent, and attended the Harvey Grammar School in Folkestone, before earning a business degree at Kingston University.
He went on to make his millions as a stockbroker at Deutsche Bank.