Question: When was the South Korean actor and singer who starred in "The Legend of the Blue Sea" born? 
Context: Park Ji-eun (born 1976) is a South Korean television screenwriter.  She wrote the hit Korean dramas "Queen of Housewives" (2009), "My Husband Got a Family" (2012), "My Love from the Star" (2013-2014), "The Producers" (2015) and "The Legend of the Blue Sea" (2016). Jung Joon (born March 6, 1979) is a South Korean actor.  Though primarily a supporting actor, he played the leading role in the 2001 television drama "Delicious Proposal" and the 2006 film "Blue Sky".  In 2013, Jung and real-life friends Yang Dong-geun and Kim Yoo-mi starred in the documentary "Black Gospel", in which they joined Korean gospel group Heritage on a month-long trip to Harlem to discover and experience the roots of gospel music. The Legend of the Blue Sea () is a 2016-2017 South Korean television series starring Jun Ji-hyun and Lee Min-ho.  Inspired by a classic Joseon legend from Korea's first collection of unofficial historical tales about a fisherman who captures and releases a mermaid, this drama tells the love story of a con-artist and a mermaid who travels across the ocean to find him.  It aired on SBS every Wednesday and Thursday at 22:00 (KST) started from 16 November 2016 until 25 January 2017. Shin Eun-soo (born October 23, 2002) is a South Korean actress.  She made her acting debut in 2016 as the female lead in movie "".  She also starred in the television series "The Legend of the Blue Sea" (SBS) as teenage Se-hwa. Shin Won-Ho (born October 23, 1991) is a South Korean singer, actor and member of multinational idol group Cross Gene.  He has featured in television series "Bachelor's Vegetable Store" (2011), "Big" (2012) and "The Legend of the Blue Sea" (2016). Jin Hyuk is a South Korean television director.  He directed "Brilliant Legacy" (2009), "City Hunter" (2011), "Prosecutor Princess" (2010), "Master's Sun" (2013), "Doctor Stranger" (2014), and "The Legend of the Blue Sea" (2016). Lee Min-ho (, born June 22, 1987) is a South Korean actor and singer.  He first gained widespread fame in Korea and parts of Asia with his role as Gu Jun-pyo in "Boys Over Flowers" in 2009.  The role won him a Best New Actor award at the 45th Baeksang Arts Awards.  He is noted for his leading roles in "City Hunter" (2011), "The Heirs" (2013) and "The Legend of the Blue Sea" (2016).  The success of Lee's television dramas throughout Asia established him as a top Hallyu star.  Lee starred in his first leading role in film with "Gangnam Blues" (2015), followed by his first China-produced film "Bounty Hunters" (2016). Second Moon () is a South Korean ethnic fusion band that has performed in several folk music festivals around the world.  It achieved mainstream recognition by creating music for popular television shows like "Princess Hours" (2006), "Love in the Moonlight" (2016) and "The Legend of the Blue Sea" (2016). Hong Jin-kyung (born December 23, 1977) is a South Korean entrepreneur, model, host, comedian and actress.  She featured in the television series "My Love from the Star" (2013), "The Legend of the Blue Sea" (2016), and starred in the variety show "Off to School" (2014).  She first became known due to her kimchi-making business which started from her mother's recipe. Park Jung-chul (born Park Chul on November 5, 1976) is a South Korean actor.  Park made his acting debut in 1997 through a talent search by the KBS network, and has since starred in the romantic comedy film "Oh!  Happy Day" (2003) and television dramas such as "Legend" (2001), "Present" (2002), "Remember" (2002), "Blue Fish" (2007), "Eight Days, Assassination Attempts against King Jeongjo" (2007), "War of Money: The Original" (2008), "My Lady" (2008), "Wife Returns" (2009), "Gwanggaeto, The Great Conqueror" (2011), and "Angel's Revenge" (2014).  He has also been a cast member of the reality show "Law of the Jungle" since 2012.
Answer: June 22, 1987