Harold Saul Guskin (May 25, 1941 – May 10, 2018) was an American actor and acting coach.
[2][3][4][5][6][7] He also coached BAFTA winning Robert Downey Jr at the beginning of RDJ's career.
He learned playing the trombone in high school but replaced it with theatre, then he started attending acting classes and did bachelor's degree in drama at Rutgers University, then earned a master's from Indiana University Bloomington.
In the 1980 he joined the Public Theater for three years where he did workshops to introduced his acting techniques.
He had contracted primary progressive aphasia, a rare form of dementia, over decade before his death.