Actor Song Chang-eui and singer Lisa dating

Song Chang-eui and Lisa from musical "Gwanghwamun Love Song" poster [Gwanghwamun Younga]

Actor Song Chang-eui and singer Lisa, co-stars of musical "Gwanghwamun Love Story," are dating.

An official with Song's agency BOM Actors said Thursday that the two started developing feelings for each other while preparing "Gwanghwamun" and became a couple after the show premiered.

They have been open about their relationship -- the entire cast and staff of the musical knew they were dating, the official added.

The two first became acquainted through musical "Hedwig and the Angry Inch" in 2009 and became close in March of this year while rehearsing for "Gwanghwamun."

Song, 32, debuted in 2002 through musical "Blue Saigon" but has appeared in several dramas and movies after shooting to stardom through TV series "Golden Bride" (SBS, 2007).

Most recently he finished filming a drama pic tentatively titled "Today" opposite actress Song Hye-kyo.

Lisa, a year older, debuted in 2003 and has appeared in several musicals including "Bandit" and "Jewel in the Palace."

"Gwanghwamun," featuring the hit songs of singer-song writer Lee Moon-se and the late-composer Lee Young-hoon, wrapped up its 20-day run in Seoul on April 10 and is now set to show in the cities of Busan, Daejeon and Ansan this month.

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