By age 12 he was performing regularly on the stage, and was awarded the Presidential Scholar In The Arts by President Reagan in 1982.

Their work has transferred to London's West End[3] and Chicago, San Francisco, Houston, Munich, Paris and Seattle.

Awards and Honors: As an adult, Mark was recognized as one of the outstanding stage performers in the United Kingdom.

Films include: Fifty First Dates, The Mod Squad, Underclassmen, Man In The Moon, Take Me With You.

In February 2007 Mark was legally married in the United Kingdom to long term partner, playwright Godfrey Hamilton.