Planet formation is a process that transforms specks of dust and ice into a multitude of planetary objects, ranging from asteroids to gas giant planets.  The building process is rich with instabilities, and employs a broad range of physical processes, such as grain coagulation, gas dynamics, gravitational interactions, and giant impacts. The Solar System is only one result of this process, and one for which our understanding is continuously evolving. Discoveries in exoplanets, planet-forming discs, and planetary dynamics demonstrates that the Galaxy is teeming with possibilities, which we have only begun to uncover.