Daniel Michael DeVito Jr. (born November 17, 1944) is an American actor and filmmaker. 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 Award and an Emmy Award. He plays Frank Reynolds on the FXX sitcom It’s Always Sunny in Philadelphia (2006–present).

DeVito is known for his film roles in One Flew Over the Cuckoo’s Nest (1975), Terms of Endearment (1983), Head Office (1985), Ruthless People (1986), Throw Momma from the Train (1987), Twins (1988), The War of the Roses (1989), Batman Returns (1992), Jack the Bear (1993), Junior (1994), Matilda (1996), L.A. Confidential (1997), The Big Kahuna (1999), Big Fish (2003), Deck the Halls (2006), When in Rome (2010), Wiener-Dog (2016) and Jumanji: The Next Level (2019). He has voiced roles in such films as Hercules (1997), The Lorax (2012), Smallfoot (2018) and Migration (2023).