Oh Seung-ah

Oh Seung-ah (, born September 13, 1988), is a South Korean actress and singer. She is a former member of the girl group Rainbow. She is best known for her role in The Second Husband (2021–2022), which gained her the title of "Serial Villain".

Life and career 1988–2016: Early life and career beginnings

Oh was born on September 13, 1988, in Seoul, South Korea. She has attended Changduk Girls' High School and Sangmyung University. Oh was given the choice to debut with Kara or Rainbow, but she chose Rainbow because she was friends with some of the members before debuting.

After becoming a member of Rainbow, she also focused on acting. She was a member of the group until its disbandment in 2016.

2017–present: Activities as an actress and leading roles She then started acting and starred in A Sea of Her Own, for which she was nominated for Excellence Award, Actress in a Daily Drama in 2017. She also starred in Grand Prince as a supporting role, for which she was praised by fans. In 2018 she played a protagonist villain role in Secrets and Lies for which she won the Best Actress award.

In 2021, Oh starred in the melodrama series The Second Husband as the main villain of the series playing the role of Yoon Jae-kyeong. In 2022, Oh returned to the small screen again as Kang Ba-da, the ruthless chaebol of Le Blanc and the lead villain of Vengeance of the Bride.

Television series Year Title Role Notes 2010 Big Thing Mina 2011–2014 The Clinic for Married Couples: Love and War Soo-yeong Cameo 2013 The Dramatic Seung-ah Play Guide Oh Seung-ah Cameo 2014–2015 Pinocchio MSC news reporter interviewer 2014 Jang Bo-ri Is Here! Choi Yoo-ra 2016 88 Street Somi 2017 KBS TV Novel – "A Sea of Her Own" Yoon Soo-in 2018 Grand Prince Kim Hyo-bin 2018–2019 Secrets and Lies Shin Hwa-gyon 2019 Drama Stage – "My Wife's Bed" Lee Yi-na Bad Love Hang Yeon-soo 2021 A Good Supper Department store VVIP customer Cameo Love (ft. Marriage and Divorce) Lee Yeon-hee Cameo (Episode 1) 2021–2022 The Second Husband Yoon Jae-gyeong 2022 Young Lady and Gentleman Ahn Ji-min Cameo (Episode 49–50) Vengeance of the Bride Kang Ba-da 2023–2024 The Third Marriage Jung Da-jung 2025 Motel California Secretary Oh To the Moon Jo Soo-jin

Web series

Television shows Year Title Role Notes 2012 The Romantic and Idol Regular member Season 1 2020 King of Mask Singer Contestant 2022 Romantic Doctor Im Chae-moo Cast Member Real Barracks Talk Host

Ambassadorship Public Relations Ambassador for 'The Miracle of 119 Won (2021)

Awards and nominations + Name of the award ceremony, year presented, category, nominee of the award, and the result of the nomination Award ceremony Year Category Nominee / Work Result Broadcast Actors Awards 2022 10 People Who Shined Korea The Second Husband KBS Drama Awards 2017 Excellence Award, Actress in a Daily Drama A Sea of Her Own MBC Drama Awards 2018 Best New Actress Secrets and Lies 2024 Top Excellence Award, Actress in a Daily/Short Drama The Third Marriage