A photo Meghan Markle posted for her daughter Princess Lilibet’s birthday also featured a special connection to her son, Prince Archie.

Prince Harry and Meghan’s daughter Lilibet turned 4 on June 4, and the Duchess of Sussex led the celebrations by posting two previously unseen pictures of her and Lilibet to Instagram.

PEOPLE confirms that Princess Lilibet was swaddled in the same merino wool blanket by British knitwear brand G.H. Hurt & Son that her big brother Prince Archie, now 6, wore for the official photo call organized to introduce him to the world when he was two days old.

The iconic British brand that has supplied baby shawls for the royal family since Queen Elizabeth had Prince Charles in 1948.

The newly unveiled picture of Meghan and Lilibet showed Lili as an infant snuggled close to her mother’s chest as the Duchess of Sussex held her daughter in bed. Infant Lili — who seemed to be asleep! — kept cozy in a striped hat as Meghan held her daughter in her arms.

“Happy birthday to our beautiful girl! Four years ago today she came into our lives – and each day is brighter and better because of it,” Meghan wrote below the Instagram carousel, which opened with a more recent shot of her and Lili snuggling close on a boat. “Thanks to all of those sending love and celebrating her special day!”

Prince Harry, 40, and Meghan, 43, became a family of four when their daughter Lilibet was born at Santa Barbara Cottage Hospital in California on June 4, 2021, following their step back from their royal roles and U.S. move in 2020. The couple were already parents to Prince Archie, now 6, who made his public debut with more fanfare.