A spherical robot, also known as spherical mobile robot, or ball-shaped robot is a mobile robot with spherical external shape. A spherical robot is typically made of a spherical shell serving as the body of the robot and an internal driving unit (IDU) that enables the robot to move. Spherical mobile robots typically move by rolling over surfaces. The rolling motion is commonly performed by changing the robot's center of mass, but there exist some other driving mechanisms. In a wider sense, however, the term "spherical robot" may also be referred to a stationary robot with two rotary joints and one prismatic joint which forms a spherical coordinate system.

BB-8 is a droid character in the Star Wars franchise. He appeared in the three films of the sequel trilogy, Star Wars: The Force Awakens (2015), Star Wars: The Last Jedi (2017), and Star Wars: The Rise of Skywalker (2019). He also appeared as a major supporting character in the animated series Star Wars Resistance, appearing in the first 17 episodes of season 1, and in the 2023 short film Rogue Not Quite One. He is a BB astromech droid serving the Resistance, and is owned by Poe Dameron. Spherical with a free-moving domed head, BB-8 is portrayed by both a rod puppet and a remote-controlled robotic unit. The character has been well received by critics and fans, and has become one of the most beloved and recognizable characters of the Star Wars saga in recent years.