Cully Hamner (born March 7, 1969) is an American comic book artist, known for his work on such books as Green Lantern: Mosaic, Blue Beetle, Black Lightning: Year One, and Detective Comics. He is the co-creator and illustrator of the 2003 graphic novel Red, which was adapted into a 2010 feature film of the same name starring Bruce Willis, as well as a 2013 sequel. He is also the co-creator of Jaime Reyes, the DC Comics character at the center of the 2023 feature film Blue Beetle.

Cully Hamner was born March 7, 1969 in Huntsville, Alabama. He graduated from Albert P. Brewer High School in Somerville, Alabama.

Since Hamner's 1992 debut on Green Lantern: Mosaic for DC Comics, he has worked for nearly every major American comic book publisher, and is chiefly known for such titles as the aforementioned Green Lantern: Mosaic, Blue Beetle, and Red. He is also one of the original members of Atlanta's Gaijin Studios. Hamner also helped start and acted as Creative Consultant to 12 Gauge Comics, publisher of such titles as The Ride, Gun Candy, Body Bags, and O.C.T.: The Occult Crimes Taskforce.

His work can be seen in Top Cow's 2005 Warren Ellis series Down. That same year in DC Comics' "Infinite Crisis" storyline, the publisher debuted Jaime Reyes, the third incarnation of the superhero Blue Beetle co-created by Keith Giffen, John Rogers, and Hamner, and whose visual look was designed by Hamner. He was the regular artist for that character's monthly series in 2006 and 2007, leaving that title with its tenth issue, though he continued throughout the following year as the regular cover artist for that book. Black Lightning: Year One, written by Jen Van Meter and illustrated by Hamner, was released in 2009 as a miniseries and as a trade paperback collection in 2010, and was subsequently nominated for two Glyph Awards.

In March 2009, it was announced that Hamner had signed an exclusive contract with DC Comics, and in June 2009, he began his run on the monthly Detective Comics, featuring The Question. After concluding his year-long tenure on that character and in light of the pending release of the film version of Red, it was announced that Hamner would return to both write and illustrate the Paul Moses character for a 40-page prequel called Red: Eyes Only.

In 2010, Summit Entertainment released Red, a feature film adaptation of the 2003 comic book of the same name that Hamner illustrated with writer Warren Ellis, starring Bruce Willis, Morgan Freeman, Helen Mirren, John Malkovich and Richard Dreyfuss.

On June 9, 2011, it was revealed by DC Comics co-publisher Jim Lee that Hamner had been enlisted in a substantial role to help guide the initiative to redesign DC's stable of characters as part of the "New 52" line-wide relaunch. On July 12, Comic Book Resources reported DC's announcement that Hamner would be teaming with writer James Dale Robinson for the first three-issue story arc of a new 12-issue series starring The Shade.

On July 19, 2013, Red 2, the sequel to Red, was released in North America. The film stars Bruce Willis, John Malkovich, Mary-Louise Parker, Catherine Zeta-Jones, Lee Byung-hun, Anthony Hopkins, and Helen Mirren, with Dean Parisot directing a screenplay by Jon and Erich Hoeber. In its opening weekend, the film grossed $18.5 million and finished in fifth place, which was lower than the $21.8 million its predecessor earned in October 2010. According to exit polling, 67% of the audience was over 35 and 52% was male. Red 2 grossed $53.3 million in North America and $94.8 million overseas for a total of $148.1 million worldwide.