Peppa Pig's Mummy is pregnant with a third piglet, a mere 21 years after the cartoon family first appeared on TV. Peppa and little bro George will have to adjust.

Peppa Pig ’s mother is pregnant with her third piglet. The long-running animated series will be forever changed in an episode that will premiere – appropriately – on Mother’s Day (30 March).

With children's cartoons, you can usually rely on one thing: the characters don't age significantly, and they don't go through tremendous life changes. But Peppa Pig has flown in the face of this convention by impregnating Mummy Pig, which was announced today via a brilliant 'live stream' on Good Morning Britain.