Malil could be set free in nine years, according to the prosecutor in the case.
Malil was convicted in September of attempted premeditated murder and assault with a deadly weapon. He was acquitted of a burglary charge.
Malil is accused of attacking Kendra Beebe in her home in San Marcos in August 2008. He found her with another man and attacked her with a kitchen knife, stabbing her more than 20 times. Beebe survived the attack.
Malil had a role as a co-worker of Steve Carell's character in "The 40-Year-Old Virgin."
The Associated Press contributed to this report.