'Big Bang Theory' actress Kelly Cuoco's pooches on US flag.

Kaley Cuoco has said sorry for letting her pooches sit on the American flag.

The actress posted the pic on Instagram on Independence Day last week.

But patriotic Americans were kwaad and slammed her for disrespecting the stars and stripes.

Kaley has now apologised for the “mistake”.

The Big Bang Theory star said the photo was taken by her dog sitter while she was out of town.

She removed the picture and posted another with a graphic of an American vlaggie in the shape of a heart.