In the past week, photographers have gotten rare opportunities to snap Brad Pitt and Angelina Jolie’s two youngest children—and boy, have they grown up! This picture was taken in Venice, Italy where Angelina is prepping to film The Tourist, a movie with Johnny Depp.

Knox Leon and Vivienne Marcheline, born July 2008, were first spotted in public over a year ago at an airport in Japan. Since then, the 19-month-old twins were also spied at an ice cream shop in Jordan.

You can see an even better shot of Knox - who looks an awful lot like big sister Shiloh - after the jump.