He has appeared sixteen films directed by his elder brother Ron Howard: Grand Theft Auto (1977), Night Shift (1982), Splash (1984), Cocoon (1985), Working Class Man (1986), Parenthood (1989), Backdraft (1991), Far and Away (1992), The Paper (1994), Apollo 13 (1995), Edtv (1999), The Grinch (2000), The Missing (2003), Cinderella Man (2005), Frost/Nixon (2008) and The Dilemma (2011).
Attended school at R. L. Stevenson Elementary in Burbank, CA.
Appeared, in 1966, as a child actor in the third filmed episode of Star Trek (1966) (Star Trek: The Corbomite Maneuver (1966)). In 2002, appeared as a Ferengi in the latest Star Trek series, Star Trek: Enterprise (2001)(Star Trek: Enterprise: Acquisition (2002)).
Along with Majel Barrett, Joseph Ruskin and Jack Donner and Vince Deadrick Sr., he is one of only five actors to appear in both Star Trek (1966) and Star Trek: Enterprise (2001).
He has German, English, Scottish, Irish, and remote Dutch, ancestry.
Reprised his Star Trek (1966) role as "Balok" for a gag during Comedy Central's "Roast of William Shatner".
While he is a conservative Republican, his elder brother Ron Howard is a liberal Democrat.