He and Green created Stan Kirsch Studios in 2008 in Los Angeles.
His death was announced on Facebook, on the page that had been created for Stan Kirsch Studios, the acting school Kirsch co-founded with his wife Kristyn Green.
Stan Kirsch, who starred in the Highlander TV series and in Friends, has died at the age of 51.
The actor died on 11 January at his home, according to documents released by the Los Angeles County Medical Examiner-Coroner.