The Martians are a short, green humanoid race presumably native to planet Mars. They have large eyes, pointed ears and a short antenna on their heads. They also have three fingers on their hands and, not unlike Humans, are apparently fond of consuming beer. The existence of Martians is a secret kept by the secret society known as the Stonecutters. At least one Martian is an actual member of the Springfield chapter of the Stonecutters and is seen singing their theme song "We Do" along with his Human fellows.