Danny DeVito works.
Danny DeVito . He gained prominence for his portrayal of the taxi dispatcher Louie De Palma in the television series Taxi ( 1978 -- 1983 ) , which won him a Golden Globe and an Emmy . A major film star , he is known for his roles in Tin Men , Throw Momma from the Train , One Flew Over the Cuckoo 's Nest , Ruthless People , Man on the Moon , Terms of Endearment , Romancing the Stone , Twins , Batman Returns , Look Who 's Talking Now , Big Fish , Other People 's Money , Get Shorty , Be Cool , and L.A. Confidential and for his voiceover in such films as Space Jam , Hercules and The Lorax . DeVito was also one of the producers nominated for an Academy Award for Best Picture for Erin Brockovich . He currently stars as Frank Reynolds on the FX and FXX sitcom It 's Always Sunny in Philadelphia .