Krystal initially debuted as a member of girl group f(x) in 2009 and released hit songs such as “La Cha Ta,” (2009), “Hot Summer,” (2011) and “Electric Shock,” (2012). She landed her first acting role in 2010 in MBC drama "More Charming by the Day,” and subsequently starred in successful dramas such as MBC’s “High Kick: Revenge of the Short Legged,” in 2011 and SBS’s “Heirs,” in 2013. Krystal left her agency SM Entertainment in 2020 and joined H& Entertainment to focus more on acting. However, she is still part of the K-pop act f(x) as the group has not been officially disbanded. Using her legal name Jung Soo-jung when acting, Jung made her debut on the big screen in 2020 through a lead role in “More Than Family.” The singer-actor has also appeared on reality programs “Jessica & Krystal,” (2014) and “Jessica & Krystal – US Road trip,” (2021) with her sister Jessica, a former member of the girl group Girls’ Generation.