John Mallory Asher (born John Mallory, January 13, 1971) is an American actor, film director, and screenwriter. In his acting career, he is perhaps best known for his role as Gary on the USA Network spin-off series based on the film Weird Science.

His biological father is actor Edward Mallory. His adoptive father is producer and director William Asher, who was married to his mother, actress Joyce Bulifant, from 1976 to 1993 (it was the third marriage for both).

John was married to his first wife, Vanessa Lee, from 1994 to 1996. He married his second wife, actress Jenny McCarthy, on September 11, 1999. Their son Evan Joseph Asher was born on May 18, 2002, and was diagnosed with autism. They divorced in September 2005.