Pig's Breakfast(1999)

Pig's Breakfast is an Australian children's series from 1999 about two aliens, Meeba and Grob, whose galactic school bus crashes at a television studio on Earth. A producer discovers them and, mistaking them for costumed actors, casts them in a TV show. Only the producer's children, Rodney and Lucy, know the truth: that Meeba and Grob are genuine extraterrestrials. The series follows the chaos that unfolds as the aliens navigate life on set while keeping their identity secret from the rest of the studio.