Matthew Avery Modine is an American actor, filmmaker, and activist whose career has spanned film, television, and theater for several decades. He rose to prominence with leading roles in acclaimed films including Birdy, Vision Quest, Married to the Mob, Full Metal Jacket, Pacific Heights, and Cutthroat Island. He later introduced his work to a new generation of audiences through his portrayal of Dr. Martin Brenner in the Netflix series Stranger Things. Throughout his career, Modine has earned recognition for his versatility and his performances in both independent and mainstream productions.