Lilibet Diana Windsor, is officially a one-year-old!

The Duke and Duchess of Sussex marked the important milestone with an intimate backyard picnic at Frogmore Cottage.

Close family friend and party guest Misan Harriman took the "candid, spontaneous photograph that the Duke and Duchess are pleased to share today," a spokesperson for the couple shared. He attended with his wife and children—and luckily for us he posted about it too!

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"It was such a privilege to celebrate the 1st birthday of Lilibet with my family and hers! Joy and face painting all around ❤️🎂🎉"

The birthday girl is all smiles in this lovely photo. From her baby blue dress and little white bow to her darling red hair—which truly makes her look like daddy's little girl—it looks like Lili's birthday celebrations were delightful.

From her baby blue dress and little white bow to the birthday's girl darling smile and red hair—it looks like Lilibet had a wonderful time.

Related: Meghan and Harry share first photo of baby Lilibet Diana—and it’s adorable

Meghan and Harry were "amazed to learn that people around the world made donations" amounting to over $100K to the World Central Kitchen (WCK) in her honor," the spokesperson continued, adding that the couple "extended their gratitude to all who have shown support for the organization, which is especially near to their hearts."  

WCK responds to humanitarian, climate and community crises. They provide meals in the wake of natural disasters. They recently responded to the crisis in Uvalde, Texas and Ukraine.

A special cake was made by none other than Claire Ptak from East London's Violet Bakery. She also created Meghan and Harry's wedding cake in 2018.

The Sussexes traveled to England with their two children—Archie, 3, and Lilibet who turned 1 on June 4. They attended the Queen's Platinum Jubilee celebrations before returning home to California.

Archie was born in the UK on May 6, 2019 but this was Lili's first trip to her father's country. She met her grandmother, Queen Elizabeth—her namesake—for the first time.

The couple's spokesperson says, the Sussexes "remain incredibly touched by the countless birthday wishes for their daughter, Lilibet Diana Mountbatten-Windsor."