Daniel Michael DeVito Jr. (/dəˈviːtoʊ/ də-VEE-toh; born November 17, 1944) is an American actor, comedian and filmmaker. Known for his short stature, raspy voice, distinct accent, and energetic comedy roles, 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. Since 2006, he has played Frank Reynolds on the FX/FXX sitcom It's Always Sunny in Philadelphia.

DeVito is known for his film roles in One Flew Over the Cuckoo's Nest (1975), Terms of Endearment (1983), Romancing the Stone (1984), The Jewel of the Nile (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 Disney's Hercules (1997), The Lorax (2012), Smallfoot (2018), and Migration (2023).