Judge Karl Sakamoto said Royce was responsible for "a tidal wave of crime" that terrorized victims in their own homes. The four robberies occurred in the fall of 2005.
Prosecutors say Royce broke into the Holloways' home, threatened the couple at gunpoint, took their wallets and drove off in their Mercedes-Benz.
Holloway plays "Sawyer" on the ABC castaway drama filmed on Oahu.
