But of the many Green Lanterns throughout the history of the DC Universe, only one man has worn the ring of both Hal Jordan and Guy Gardner in live-action and animation: Nathan Fillion.

Nathan Fillion is the current star of the hit LAPD show, The Rookie, in which he plays John Nolan. The Canadian-American actor was the title character in the 2009 ABC show, Castle, and has a ...

Nathan Fillion played T.D.K. in The Suicide Squad and Master Karja Guardians of the Galaxy Vol. 3, but reunites with filmmaker James Gunn for a leading role as the DCU's Guy Gardner/Green ...