Tengen Toppa Gurren Lagann (天元突破グレンラガン Tengen Toppa Guren Ragan lit. "Pierce the Heavens, Gurren Lagann"), also known as Gurren Lagann or "TTGL" for short, was a 2007 Gainax anime series written by Kazuki Nakashima and directed by Hiroyuki Imaishi. It was adapted into a manga series the same year by ASCII Media Works and was illustrated by Kotaro Mori until 2013 when it ended.