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Mashayekhi began professional acting on stage in 1957. His first feature film role was
Brick and Mirror (1965, Ebrahim Golestan). After a four-year break, he acted in
The Cow (1969, Darius Mehrjui) and
Kaiser (1969, Masoud Kimiai). Mashayekhi commonly appeared as an elderly grandfather because of his white hair and charismatic face and figure. He received a best performance award for
The Grandfather (1985, Majid Gharizadeh) from the First Festival of Non-aligned Countries in North Korea.