Daniels was born as Kevin Dwight Daniels in San Diego, California. He would graduate from the Juilliard School.
Daniels would replace the former voice actor for Mack, Paul Williams. He would voice all of Mack's Season 3 Daria appearances, beginning with Daria Dance Party and ending with The Lawndale File. Daniels would be replaced by Amir Williams beginning in Season 4.
Since departing Daria, Daniels has played roles on many popular television shows, including Law and Order, Buffy the Vampire Slayer and Smallville. His most recent role was in an 11 minute film called Mercenary in 2008. He has also appeared in several theater productions in and out of New York.
- Kevin Daniels is sometimes credited as Kevin Daniels Jr.
- Daniels is 6'5" (1.96m) tall.
- His nickname is "KD".