Bellamy Blake is a fictional character from the television series The 100, which is based on the book series by Kass Morgan. He is portrayed by actor Bob Morley and is known for his leadership qualities and strong sense of responsibility. Bellamy is the older brother of Octavia Blake and plays a crucial role in the survival of the group of young people sent back to Earth after a nuclear apocalypse. Throughout the series, Bellamy evolves from a protective brother to a key leader among the survivors. He often grapples with moral dilemmas and the challenges of making difficult decisions for the greater good. His character is central to the themes of loyalty, sacrifice, and the complexities of human nature in a post-apocalyptic world.