Mikey Walsh is a fictional character from the popular 1985 film The Goonies, directed by Richard Donner. He is portrayed by actor Sean Astin and serves as the leader of a group of kids on an adventurous quest to find a hidden treasure. Mikey is characterized by his optimism, bravery, and strong sense of friendship, which drives the group to overcome various challenges. In the film, Mikey's determination to save his family's home from foreclosure motivates the treasure hunt. He is known for his iconic line, "Goonies never say die!" This phrase encapsulates the spirit of adventure and camaraderie that defines the group throughout their journey.