Question: When is the cast in The Guardians born that is a South Korean singer, actor, fashion designer and television presenter?

Context paragraphs:
Kelly Osbourne: Kelly Lee Osbourne (born 27 October 1984) is a British singer-songwriter, actress, television presenter and fashion designer.  The daughter of Ozzy and Sharon Osbourne, she is known for her appearances on "The Osbournes" with her family, for which they won a 2002 Emmy Award for Outstanding Reality Program, as well as on E!'s "Fashion Police", where she was a presenter from 2010 to 2015.  She has also appeared on "Dancing with the Stars", in which she and her professional dance partner Louis van Amstel took third place.  She is the voice of Hildy Gloom in the Disney XD animated series "The 7D".  She is also a judge on both "Australia's Got Talent" and "Project Runway Junior".

Caroline Righton: Caroline Righton (born 26 February 1958), is an English television presenter, author and fashion designer, best known for being a presenter on the daily Breakfast Television station TV-am and being an anchor of the Channel 4 news show, The Channel Four Daily.

Alien Huang: Alien Huang (; born 28 November 1983), also known as Xiao Gui (), is a Taiwanese singer, actor, television presenter, lyricist, writer, illustrator and fashion designer.

Chun Myung-hoon: Chun Myung-hoon (born April 6, 1978) is a South Korean singer, rapper, actor and television presenter.  He was a member of boy band NRG.  He released his single, "Welcome To The Jungle" on October 19, 2012.  He is well known for a cast member on several TV shows include "Girl Spirit".

Kim Hee-chul filmography: Kim Hee-chul (born July 10, 1983), better known by the mononym Heechul, is a South Korean singer, songwriter, presenter, and actor.  He is a member of South Korean boy band Super Junior and further participated in its subgroup, Super Junior-T as well as project group with TRAX's Jungmo, M&D.  Aside from group activities, he participated in various television dramas, appeared as a radio DJ and television presenter.  He is a "League of Legends (LoL)" Gamer on LoL "Champions" and "Celebrity Event".

Kim Hee-chul: Kim Hee-chul (born July 10, 1983), better known by the mononym Heechul, is a South Korean singer, songwriter, presenter, and actor.  He is a member of South Korean boy group Super Junior and has further participated in its subgroup, Super Junior-T as well as project group with TRAX's Jungmo, M&D.  Aside from group activities, he participated in various television dramas, appeared as a radio DJ and television presenter.  He is a "League of Legends" Gamer on LoL "Champions" and "Celebrity Event".

Sunmin: Sunmin (Hangul: 선민, "Katakana": ソンミン, born August 4, 1987) is a South Korean singer who speaks and sings in Korean, Japanese, and English.  She debuted in 2006, with the single "Keep Holding You," a collaboration with the Japanese R&B singer Toshinobu Kubota.  Her career was initially focused on the Japanese market, but her work became focused in South Korea from 2009 to 2010.  She also contributed to original soundtracks of South Korean television series "Master of Study" and "Gloria (2010 TV series)".  In 2010 to 2011, she was in the main South Korean musical production of "Jekyll & Hyde" as Lucy.  In 2012 to 2013, she reprised her role as Lucy in the South Korean national tour.  In spring 2013, Sunmin played Josephine in the South Korean production of "Arsène Lupin", the musical.

Key (entertainer): Kim Ki-bum (born September 23, 1991), better known by his stage name Key, is a South Korean singer, actor, fashion designer and television presenter.  Born and raised in Daegu, South Korea, he later travelled to Seoul after a successful audition at the S.M. National Tour Audition Casting.  In 2008, Key debuted as a member of South Korean boy group Shinee, who later went on to become one of the best-selling artists in Korea.  Key is widely recognised as a singer, but he has also ventured into different careers, notably as an actor and fashion designer.

Lee Hyori: Lee Hyo-ri (born May 10, 1979), is a South Korean singer, record producer, activist, actress and television presenter.  Dubbed as the "Nation's Fairy" during her "Family Outing" days, she debuted as a member of South Korean girl group Fin.K.L, but has since become a solo artist.  In 2003, she released her debut solo album "Stylish" which won several "Artist of the Year" awards.  In 2006, Lee was the highest-paid female singer in South Korea when she signed a contract with Mnet Media.

The Guardians (2017 TV series): The Guardians (Hangul: 파수꾼 ; RR: "Pasuggun "; lit.  Lookout ) is a South Korean television series starring Lee Si-young, Kim Young-kwang, Kim Tae-hoon, Kim Seul-gi and Key.  The drama aired on MBC on Mondays and Tuesdays at 22:00 (KST) from May 22 to July 11, 2017.

Supporting paragraphs: The Guardians (2017 TV series) Key (entertainer)
Answer: September 23, 1991