Complex sentence: His first starring role was actually at age 16 in the 1964 movie The Student Prince, a role he had gotten after some school friends showed his picture to the people making a movie at their secondary school.
Split into simpler sentences: His first starring role was actually at age 16 in a 1964 movie called The Student Prince. He got this role after some school friends showed his picture to the people making a movie at their secondary school.