Knox & Vivienne Turn 2!

As the Jolie-Pitt twins hit their latest milestone, take a look back at their cutest moments

DADDY'S GIRL

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According to mom Angelina Jolie, her little girl Vivienne Jolie-Pitt is a girly girl, but the 21-month-old (who turns two on July 12) looks pretty tough while out in Venice with dad Brad Pitt on April 16.

VIEW FROM THE TOP

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Ciao, Italia! Two days earlier, Vivienne and her twin brother Knox make a rare showing together – with mom and grandma Jane Pitt – from their Venice balcony on April 14.

PUCKER FACE

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Jolie gives Knox a sweet smooch on March 25 while enjoying the view in Venice. During another balcony visit with mom two weeks later, the playful tot bids arrivederci! to his stuffed bunny, which accidentally falls into the Grand Canal.

CAPPED OFF

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The twins, 20 months, stay warm during a stroll through Venice with mom and dad on March 12. The little ones "are classic boy and girl," Jolie told Vanity Fair. "She's really female. And he's really a little dude."

WHAT A TREAT!

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They all scream for ice cream! Knox and Vivienne, joined by big sis Shiloh, then 3½, each get a sweet treat before boarding a boat for a sightseeing tour through Venice on March 3.

LITTLE TRAVELERS

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Having already visited France, Japan and Jordan – and their home turf, the United States – 19-month-old Knox and Vivienne pop up in Venice, Italy, on Feb. 22, 2010. Jolie has always maintained she wants her children to have global experiences and "find friends wherever they are in the world."

TWO SCOOPS

Pitt and Jolie bring the twins, 14 months, to an ice cream shop in Amman, Jordan, in October 2009. There, Pitt offers Vivienne some pecan and caramel ice cream, while Knox samples a mango treat with mom.

ARRIVAL PARTY

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Knox and Vivienne, 6 months, land with the family in Narita, Japan, on Jan. 27, 2009. "When you look at them, it's like they were made for each other," Jolie told German Vanity Fair of the pair. "They smile at each other, sniff each other, touch each other. It's just beautiful."

DOUBLE HAPPINESS

It's two bundles of joy for Pitt and Jolie, who introduce 3-week-old twins Knox Leon and Vivienne Marcheline, born July 12, 2008, on the cover of PEOPLE. "It is chaos, but we are managing it and having a wonderful time," Jolie said of her eight-member family.