Princess Lilibet is turning 3!

Prince Harry and Meghan Markle kicked off their daughter’s pre-birthday bash by celebrating at their Montecito, Calif., home with close friends and family Sunday, Page Six can confirm.

People was the first to report the news.

Meghan Markle, Prince Harry, Lilibet and Archie.
Meghan Markle and Princess Lilibet.

Last month, Markle — who also shares son Prince Archie, 5, with Harry — gave a rare insight into their second-born child’s personality.

The “Suits” alum, 42, told students at Lightway Academy in Nigeria that dance was Lilibet’s “favorite class” because of “all the jumping around.”

While giving a speech at the school about mental health, Markle shared a recent conversation she had with the toddler.

“A few weeks ago, she looked at me and she could just see the reflection in my eyes,” she recalled. “And she was [like], ‘Mama, I see me in you.’”

Meghan Markle, Prince Harry, Lilibet and Archie.

Markle expressed how much she missed her children during her and the Invictus Games founder’s three-day trek to promote mental health for soldiers in Nigeria.

“Today is Mother’s Day [in America],” she said during a speech at the Lagos State Government House May 12.

“So it feels appropriate that, although of course we are missing our children, I’m missing my babies, it feels very appropriate to be in the motherland and amongst family.”

Prince Harry ans Meghan Markle in Nigeria.
Meghan Markle, Prince Harry and Archie.