Complex sentence: He has also appeared in a variety of films such as "Cool Hand Luke" and "The Outlaw Josey Wales," including a key role in the Clint Eastwood movie "Kelly's Heroes".
Split into simpler sentences: He has also appeared in a variety of films such as "Cool Hand Luke" and "The Outlaw Josey Wales". He also had a key role in the Clint Eastwood movie "Kelly's Heroes".