Gregory Michael Cipes (born January 4, 1980) is an American voice and film actor. He is also a singer, musician, composer, and professional surfer.
Cipes' best known role is Beast Boy in the Teen Titans animated series. He would continue to reprise the role in the series spin-off movie Teen Titans: Trouble in Tokyo, as well as the video game adaptations of the series and the online video game DC Universe Online. He was also the voice of Atlas in the 2003 Astro Boy anime series, and is widely known for his past role as the voice of Kevin Levin in Ben 10 Alien Force and in future variations of the Ben 10 franchise.