Michu Meszaros is a Hungarian actor with a growth condition that left him a little over two feet tall, 25 pounds, and the appearance of a child. He also was an avid circus performer and had most of his funds seized by the Hungarian People's Republic (Communist party). Shockingly, he got sick of living in Hungary and defected to America.

Here he is in his ALF costume from the TV show "ALF". He physically acted as ALF in the scenes that required full body shots (though he did not voice ALF). Unfortunately, he was never in seasons 3 - 4 (they fired him) and he was never credited for his role.

He passed away in 2016. On the bright side, he had a street named after him and we have this cool picture so it wasn't all bad.

Source: Wikipedia