Jamie Jilynn Chung (born April 10, 1983) is a Korean-American actress and former television personality who first gained fame in 2004 as a cast member on the MTV reality series The Real World: San Diego and subsequently through her appearances on its spin-off show Real World/Road Rules Challenge: The Inferno II. She eventually transitioned into acting and has since become known for her roles in films such as Sorority Row, The Hangover Part II and Sucker Punch and having been the series lead in the ABC Family television miniseries Samurai Girl.
She voiced GoGo Tomago in the 2014 Disney animated feature film, Big Hero 6 and will reprise the role again in the upcoming 2017 television series of the same name, she also portrayed Fa Mulan in the ABC fantasy-drama series Once Upon a Time, Sienna and The Tri Pi Sister in the ABC Family TV show Greek, Trina Paiz in the ABC TV show Grey's Anatomy, Romy Lee in the ABC TV show Castle and Chelsea Barnes in the 2009 Disney Channel Original Movie, Princess Protection Program.