Ben 10 is an American animated series created by Man of Action, produced by Cartoon Network Studios and distributed by Warner Bros. Domestic Television. The series is about a 10-year-old boy named Ben Tennyson who gets a watch-style alien device called the "Omnitrix". Attached to his wrist, it allows him to transform into 10 different alien creatures with different abilities, allowing him to fight evil from Earth and space with his cousin Gwen and grandfather Max. The series first aired on Cartoon Network as a sneak peek on December 27, 2005, as part of "Sneak Peek Week", airing alongside other shows, including My Gym Partner's a Monkey, Robotboy and Zixx. It later became a full series airing from January 13, 2006, to April 15, 2008.

Gwendolyn "Gwen" Tennyson, occasionally known as Lucky Girl, is a fictional character that appears in Cartoon Network's Ben 10 franchise, created by Man of Action. The paternal first cousin and best friend of title protagonist Ben Tennyson, Gwen is a core member of Ben's team who frequently aids him in his various adventures to defeat villains and criminals and protect and save earth and the universe. A highly intelligent and strong martial artist, Gwen later develops magic abilities that are eventually revealed to be alien in nature, having inherited it from her alien paternal grandmother, Verdona.