Benjamin Kirby “Ben” Tennyson, commonly known as Ben 10, is a fictional superhero and the title protagonist of the Ben 10 franchise. An initially normal 10-year-old boy until he discovers the Omnitrix, a powerful watch-like device which allows him to turn into (initially ten but unlocks more) different aliens, he was created for Ben 10 (2005–2008), in which he is voiced by Tara Strong for his 10-year old voice. Yuri Lowenthal voice Ben’s teenage voice for Ben 10: Alien Force (2008–2010), Ben 10: Ultimate Alien (2010–2012) and Ben 10: Omniverse (2012–2014), with Strong returning to voice Ben in Ultimate Alien in one episode as well as Omniverse in flashbacks and in the rebooted Ben 10 (2016–2021), with Lowenthal returning for the latter’s 2021 series finale.