Complex sentence: Mark Richard Hamill (born September 25,1951) is an American actor, voice actor, and writer best known for his portrayal of Jedi and pilot Luke Skywalker, son of fallen Jedi knight Anakin Skywalker in the "Star Wars" film series.
Split into simpler sentences: Mark Richard Hamill (born September 25,1951) is an American actor, voice actor, and writer. He is known for playing Luke Skywalker in the "Star Wars" film series.