Pilot Season: Willa Holland Joins Arrow

The O.C. alum Willa Holland has been cast in the CW pilot Arrow, Deadline reports.

Pilot Season: Melrose Place's Katie Cassidy lands female lead in CW's Arrow

Arrow, based on the DC comics character Green Arrow, stars Stephen Amell as a superhero who fights crimes using archery and martial arts. Arrow's alias is the wealthy playboy-turned-politician Oliver Queen.  Holland will play Queen's bratty younger sister Thea. Gossip Girl's Katie Cassidy was cast earlier this week as the female lead.

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Arrow will be executive-produced by Brothers & Sisters' Greg Berlanti, Marc Guggenheim and The Vampire Diaries' Andrew Kreisberg.