Angelina Jolie, Brad Pitt's twins Vivienne and Knox are officially 16 — see their best photos

It's a big week for Angelina Jolie and her family: her youngest children, twins Vivienne Marcheline and Knox León , are officially 16 years old, if you can believe it.

The twins, who were born in 2008 and who the Maleficent actress shares with ex-husband Brad Pitt , are celebrating their milestone birthday on July 12.

The former Mr. and Mrs. Smith co-stars, who split in 2017 (though had a tumultuous, drawn-out divorce), share six kids together : Maddox , 22, Pax , 20, Zahara , 19, Shiloh , 18, and the twins.

Angelina first announced she was expecting the twins at the Independent Spirit Awards in February 2008, when she walked the red carpet alongside Brad in a slinky black dress perfectly accentuating her growing bump.

She gave birth to her youngest daughter and son, Knox first and Vivienne minutes after, while in Nice, France.

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Knox was named after Brad's grandfather, Hal Knox Hillhouse ; his middle name, León, is the name of Angelina's great-great grandfather. Meanwhile, Vivienne's middle name, Marcheline, is a nod to Angelina's mom, actress Marcia Lynne Bertrand , who was married to Angelina's father, fellow actor Jon Voight , from 1971 to 1980, and passed away in 2007.

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The twins made their debut in the spotlight at just three weeks old, when they appeared on the cover of People's August 2008 issue.

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They spent their first few months at Angelina and Brad's former vineyard — and major source of acrimony during their divorce — Château Miraval in Provence, France, where the Jolie-Pitt family were spending their summer.

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"It is chaos, but we are managing it and having a wonderful time," Angelina said at the time, with Brad adding, "[It's] still a cuckoo's nest."

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Despite their splashy debut as newborns, Vivienne and Knox have kept a low profile since , with the exception of some special appearances in their mom's movies.

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Knox voiced the character of Ku Ku in Kung Fu Panda 3 , which was released in 2016. His mom starred as Tigress opposite Kate Hudson, Jack Black, Bryan Cranston, Seth Rogen, and Jackie Chan , among others.

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Vivienne has also had her own time on the screen. In 2014, she had a role in Maleficent as the younger version of Elle Fanning's character Aurora, a.k.a. a young Sleeping Beauty.

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"When we did it together, we had a good time. I was actually shocked that she was doing so well she went back and hit her mark! It's frightening," Angelina said during a Disney roundtable at the time.

Vivienne and Knox live primarily with their mom, who in 2021 purchased a $25-million Los Angeles home in the historic Laughlin Park enclave in Los Feliz, LA, formerly owned by film legend Cecil B. DeMille , and not far from Brad's own million-dollar Los Feliz estate , which he sold this year.