AceShowbiz -

Karen Gillan plays coy on her role in "Guardians of the Galaxy", in which she is rumored to be cast as a new Marvel member named Angela the bounty hunter. The 25-year-old actress merely confirms that she is indeed on board the James Gunn movie to villainize it with her portrayal of a mystery character.

"I can't really say anything about it other than my character is really bad," Gillan told Scotsman.com in a red-carpet interview at the Edinburgh Film Festival. The actress, whose name rose to stardom after starring on "Doctor Who", then continued, "My hands are more tied on this than they were on 'Doctor Who'!"

An article supposedly taken from a Glasgow, Scotland newspaper first sparked the casting rumors. In the excerpt, a so-called Marvel insider claimed that Gillan would tackle a role of Angela, originally a fictional character in Image Comics' "Spawn" series.

"Karen will be stunning as the chief female villain of the movie," the source told the newspaper. "But she will have her work cut out as the role involves a lot of physical workouts and with a costume as revealing, she will have to be in top shape."

Headlined by Chris Pratt, "Guardians of the Galaxy" is up opposite "Fifty Shades of Grey" in theaters on August 1, 2014.