Former child star Benji Gregory – the actor best known for his role in the hit 1980s sitcom ALF – has died at the age of 46.

His sister, Rebecca Pfaffinger, said in a social media post he was found dead in his car alongside his assistance dog last month.

She told celebrity news site TMZ he had fallen asleep in the vehicle in a car park in Arizona and had died of heatstroke. His dog, Hans, also died.