Sylvester Stallone, commonly known as 'SLY', is an American actor, director, producer, and screenwriter. He is best known for his role in the Rocky film series, which earned him three Academy Award nominations. Stallone has also starred in other successful films such as Rambo, The Expendables, and Cop Land. He is also well-known for his close friendships with fellow actors, including Arnold Schwarzenegger, Bruce Willis, and Dolph Lundgren.