Peter Phillips and fiancée Harriet Sperling enjoy family outing before upcoming wedding

Peter Phillips and Harriet Sperling enjoyed a romantic day at the Badminton Horse Trials on Saturday, with their wedding fast approaching in a matter of weeks.

The 48-year-old, who is a grandson of the late Queen Elizabeth II, and his bride-to-be seemed completely at ease while strolling through Badminton Park in Gloucestershire, roughly a month before their June 6 wedding date.

The son of Princess Anne and Captain Mark Phillips wore an easy-going ensemble with camel-colored trousers, a striped shirt, and sunglasses.

Harriet, who works as an NHS nurse, showcased her talent for equestrian event attire with a stylish and understated look.

She opted for blue jeans paired with a white blouse featuring a striking ruffle at the front.

Adding a modern twist, she wore dainty gold jewelry, sunglasses, and carried a large bag, complementing her outfit with burgundy Adidas Gazelle sneakers.

As temperatures fell in the afternoon, she added a brown barn jacket to stay warm.

An observer shared with Hello: "Peter and Harriet seemed truly in their element, engaging with friends and mingling cheerfully with the crowd at Badminton. Their affection was evident, frequently holding hands and leaning into one another with radiant smiles."

The outing turned into a family affair as Peter brought along his two teenage daughters from his previous marriage with Autumn Kelly.

Savannah, 15, enjoyed the lovely weather in a white cropped top paired with a flowing skirt, accessorized with Ralph Lauren sneakers.

The bond between father and daughters was evident, as Phillips tenderly put his arm around Isla during their walk.

He shared a fun moment with Savannah in the sunshine, making her laugh with his jokes.

Peter's sister, Zara Tindall, along with her husband Mike, attended the esteemed equestrian gathering with their three children.

Their eldest daughter, Mia, 12, wore a floral skirt and T-shirt ensemble, similar to her older cousins, complemented by a cap, crossbody bag, and sneakers.

Candid and heartfelt moments between Zara and her youngest children were captured throughout the day.

The former Olympic equestrian lovingly embraced her five-year-old son Lucas while they watched the event, later receiving a sweet kiss from him.

Additionally, seven-year-old Lena enjoyed being on Zara's lap, affectionately wrapping her arm around her mother's shoulders.