Lucas Charles Sinclair, portrayed by Caleb McLaughlin, is a main character in Stranger Things. He is the best friend of Mike Wheeler, Dustin Henderson, Will Byers and Eleven. He is also the older brother of Erica Sinclair as well as the on-and-off boyfriend of Max Mayfield. He is a member of "the Party" and the Hellfire Club, and is a former player for the Hawkins Tigers.