The sentence, handed down by a Canadian judge, was automatic with his second-degree murder conviction, with only the length of parole ineligibility in question.
CBC reported the news.
The 24-year-old’s sentencing was handed down by Justice Kathleen Kerr of the British Columbia Supreme Court in Vancouver. Court proceedings were held in June to determine when Grantham should be eligible for parole.
The previous hearing made headlines after prosecutors said that Grantham — whose credits include the 2010 film “Diary of a Wimpy Kid” and a 2019 episode of “Riverdale” — allegedly plotted an attempted assassination of Prime Minister Justin Trudeau in which he packed his vehicle with guns, ammunition, a dozen Molotov cocktails and a map to Trudeau’s family residence in Ottawa. He then allegedly stopped en route and decided to turn himself in to the police.