Muppets From Space (1999)

When adopted Gonzo and his rat pal Rizzo embark on a quest to find Gonzo's real family, Gonzo discovers that his long-lost relatives are actually aliens from a distant planet. After announcing to the world on Miss Piggy's talk show, "UFO Mania," that he plans to find his family and prove once and for all that life on other planets exists, he becomes the target of paranoid goverment operative K. Edgar Singer. After a daring escape from the Singer compound, Gonzo tracks down his mother's ship and faces the most difficult question of his life: does he climb aboard and join the family he has always wanted or does he stay on Earth with the family and friends that he has always known and loved?