|Date of Birth||31 July 1949, Boston, Massachusetts, USA|
|Date of Death||4 July 1999, Berkeley, California, USA (complications of bronchitis)|
|Height||4' 7" (1.4 m)|
Mini Bio (1)
Mark O'Brien was born on July 31, 1949 in Boston, Massachusetts, USA. He is known for his work on The Sessions (2012) and Breathing Lessons: The Life and Work of Mark O'Brien (1996). He died on July 4, 1999 in Berkeley, California, USA.