Prince Harry and Meghan Markle kicked off celebrations for their daughter Princess Lilibet's third birthday over the weekend.

On Sunday, the Duke and Duchess of Sussex held a pre-birthday bash for Princess Lilibet at their mansion in Montecito, California, People reported.

Prince Harry and Markle -- who also share 5-year-old son Prince Archie -- invited family members, friends and Princess Lilibet's pals to celebrate their daughter turning 3 on Tuesday.

Last month, the Sussexes celebrated Prince Archie's fifth birthday privately before Markle and Prince Harry headed to Nigeria for a three-day visit.

Prince Harry, Meghan Markle Duchess of Sussex
Britain's Prince Harry (R), Duke of Sussex, and Britain's Meghan (L), Duchess of Sussex, arrive at the Lightway Academy in Abuja on May 10, 2024 as they visit Nigeria as part of celebrations of Invictus Games anniversary. Kola Sulaimon/AFP via Getty Images

While their two children did not join them on the trip, Markle talked about Prince Archie and Princess Lilibet during a visit to a school in Nigeria's capital Abuja.

Markle told the young students that her daughter's "favorite class" involved "singing and dancing," probably because of "all the jumping around," according to People.

She also shared that her son liked construction as students showed them their robotic projects.

Prince Harry and Meghan Markle
Britain's Prince Harry (R), Duke of Sussex, and Britain's Meghan (L), Duchess of Sussex, take part in activities as they arrive at the Lightway Academy in Abuja on May 10, 2024 as they visit Nigeria as part of celebrations of Invictus Games anniversary. KOLA SULAIMON/AFP via Getty Images

While discussing mental health, the Duchess of Sussex detailed an emotional conversation she had with Princess Lilibet.

"Our daughter, Lili, she's much, much tinier than you guys. She's about to turn 3. And a few weeks ago she looked at me and she would just see the reflection in my eyes. And she [goes], 'Mama, I see me in you,'" Markle told the students.

She added, "Oh, now she was talking really literally. But I hung onto those words in a very different way. And I thought, yes, I do see me in you, and you see me in you."

The last day of Prince Harry and Markle's trip fell on Mother's Day on May 12.

Markle admitted she was missing their "babies" during a brief speech at the State Governor House in Lagos that day.

The Duke and Duchess of Sussex Visit South Africa
Meghan, Duchess of Sussex and their baby son Archie Mountbatten-Windsor at a meeting with Archbishop Desmond Tutu at the Desmond & Leah Tutu Legacy Foundation during their royal tour of South Africa on September 25, 2019 in Cape Town, South Africa. Toby Melville - Pool/Getty Images

"I am very, very grateful, I am very humbled, and today is Mother's Day," the duchess said, as seen in a video shared via TikTok by Arochukwu Network.

"So it feels appropriate, but though of course we are missing our children, I'm missing my babies, but it feels very appropriate to be in the motherland and amongst family," Markle added.

Markle also honored her children in another way when she and Prince Harry attended the reception at the State Governor House.

The Duchess of Sussex donned a yellow Carolina Herrera dress made for her when she was pregnant with Archie.

Markle sported the same floor-length gown in photos shared on Valentine's Day in 2021 to announce that they were expecting their second child together.

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Meghan Markle, Prince Harry, Lilibet diana, Lilibet, Prince Archie