Iris (Korean: 아이리스; RR: Airiseu) is a 2009 South Korean espionage television drama series, starring Lee Byung-hun, Kim Tae-hee, Jung Joon-ho, Kim Seung-woo, Kim So-yeon and Choi Seung-hyun. The plot revolves around two best friends from the 707th Special Mission Group recruited into a secret South Korean black ops agency known as the National Security Service. As the two friends find their loyalties tested and forge new, unlikely alliances, the journey takes them from their home country to Hungary, Japan, and China where they find themselves at the center of an international conspiracy. It aired on KBS2 from October 14 to December 17, 2009, on Wednesdays and Thursdays at 21:55 for 20 episodes.

With a budget in excess of 40 billion won (34 million USD), Iris along with its spin-off Athena: Goddess of War, share the record for the most expensive Korean dramas ever produced. The series was a critical and commercial success, with an average viewership of over 30% in addition to ranking as the top program consistently every week after its debut. The series also took home many of the highest honors at the 2009 KBS Drama Awards, including the Daesang Award for Lee Byung-hun.

The success of the series has led to a feature film, a 2010 spin-off, and a sequel series in 2013.