Since joining HKRep in 2001, Mercy Wong has taken part in more than a hundred productions, playing many characters with nuanced performances that excited and moved the audience. Recent productions include Ambiguous (re-run), Stay with the Flow, The Doctor, Moscow Express, Liu Rushi, my Dear, Sœurs, February 14 – a musical, The Top Restaurant, Confrontations, Love à la Zen, Road to Damascus, Winter and A Winter Funeral. In 2019, she appeared again in Beijing and Shanghai as De Ling in the Putonghua version of De Ling and Empress Dowager Ci Xi won much critical acclaim.
 

She has received numerous nominations at the Hong Kong Drama Awards for her performances in A Doll’s House, Secret of Resurrection, Rape Virus, The Importance of Being Earnest, February 14, A Flea in Her Ear, Rabbit Hole, The Cherry Orchard, The Emperor, his Mom, a Eunuch and a Man, Wait Until Dark, Hu Xueyan, my Dear, Buried Child, The Father , Auspicious Day and Liu Rushi, my Dear. To date, she has received three such awards: Best Actress (Tragedy/Drama) for De Ling and Empress Dowager Ci Xi (Cantonese version) in 2007; Best Supporting Actress (Comedy/Farce) for Writing in Water in 2010; Best Actress (Tragedy/Drama) in The Truth about Lying, a Hong Kong Arts Festival production in 2011. In 2019, she was awarded Best Actress at the 2nd Chinese Theatre Awards for Hu Xueyan, my Dear. She was also nominated for Best Actress (The 3rd Chinese Theatre Awards) and Best Supporting Actress (The 7th Chinese Theatre Awards) for her performances in Marriage (re-run) and The Top Restaurant respectively.
 

She also participated in the creation and performance of HKRep’s Black Box productions Call Love and Good Things Going. In 2015, she presented her own script, The Day after the Sixth Day, at Prospect Theatre’s Playwright Scheme X. In July 2022, The Day after the Sixth Day renamed as Female N°7 premiered at HKRep Black Box Theatre.
 
Mercy graduated from the School of Drama, The Hong Kong Academy for Performing Arts, majoring in acting.