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The Simpsons: Producer points out an error in the cartoon!

The tweet posted by executive producer Matt Selman.Image source, Twitter/The Simpsons/@mattselman

Did you spot this mistake in The Simpsons?

Executive producer of the show Matt Selman shared a moment in one of the programme's episodes, which he says shows a mistake!

In the episode, Marge is seen sat on the sofa telling 91热爆r that she is pregnant with their third child Maggie - but it appears there's a photo of Maggie on the wall in the background! D'oh!

Some people replied saying it could be Lisa as a baby as they looked similar when they were babies.

What do you think? Had you already spotted this? Let us know in the comments below!