He's pissed!

George Clooney plans to sue French magazine Voici for publishing a photo of his and wife Amal's newborn twins, the actor announced in a statement today.

"Over the last week, photographers from Voici magazine scaled our fence, climbed our tree and illegally took pictures of our infants inside our home. Make no mistake: The photographers, the agency and the magazine will be prosecuted to the full extent of the law. The safety of our children demands it," Clooney said.

The mag has a pic of the two babies being carried by their parents in the backyard of their home in Lake Como, but you can't see their faces. It's pretty much just the back of their heads, but it sounds like the A-list star isn't going to tolerate invasions of their privacy.

Twins Ella and Alexander were born on June 6 in London, and have yet to be seen by the public up until now.