Voice actor David Graham has died at the age of 99. Graham was known for voicing characters on popular television shows including, "Thunderbirds," "Peppa Pig" and "Doctor Who."

The man behind one of the world’s most familiar voices has died aged 99. In a long career, British actor David Graham provided the voices for characters in TV series including Peppa Pig, Thunderbirds and Doctor Who. For today’s generation of children, his voice will be instantly familiar as that of Grandpa Pig, in the Peppa Pig series.

The actor known for voicing characters on TV shows “Peppa Pig” and “Thunderbirds” has died at the age of 99. David Graham’s death was confirmed by Jamie Anderson, the son of late “Thunderbirds” creator Gerry Anderson, who died in 2012.