Maximillion Drake Thieriot (born October 14, 1988) is an American actor. He began his career with roles in many family films, including Catch That Kid (2004) with Kristen Stewart, The Pacifier (2005) with Vin Diesel, and Nancy Drew (2007) with Emma Roberts. In 2009, he starred in the erotic thriller Chloe alongside Julianne Moore, Liam Neeson, and Amanda Seyfried. In 2012, he played the lead role in the horror film House at the End of the Street alongside Jennifer Lawrence.

From 2013 to 2017, Thieriot played Dylan Massett in the A&E horror series Bates Motel, a modern prequel to Alfred Hitchcock's Psycho. After that, he was a series regular in the first five seasons of the CBS drama NCIS. In 2022, he joined the main cast of the Netflix series Fire Country.