Richard William "Wil" Wheaton III (born July 29, 1972) is an American actor and writer. He portrayed Wesley Crusher on the television series Star Trek: The Next Generation, Gordie Lachance in the 1986 film Stand by Me (based on the 1982 novella "The Body" by Stephen King), Joey Trotta in Toy Soldiers and Bennett Hoenicker in Flubber.

Wheaton has also appeared in recurring voice acting roles as Aqualad in Teen Titans, Cosmic Boy in Legion of Super Heroes and Mike Morningstar/Darkstar in the Ben 10 franchise's original continuity. He appeared regularly as a fictionalized version of himself in the sitcom The Big Bang Theory and in the roles of Fawkes in The Guild, Colin Mason in Leverage and Dr. Isaac Parrish in Eureka.

He played the cadet in the revival series episode "The Light Brigade".