Oh Seung Ah

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Oh Seung Ah - Biography, Profile, Facts, and Career

Oh Seung Ah is a South Korean actress and singer.

She initially gained fame as a member of former group Rainbow, before shifting her career into acting and appearing in drama series such as The Second Husband (2021-2022), Vengeance of the Bride (2022-2023), and The Third Marriage (2023-2024).


Oh Seung Ah began her career in the entertainment industry as a member of the girl group RAINBOW in 2009. However, the group disbanded in 2016 and the members left the agency.

Following the disbandment, Seung Ah signed an exclusive contract with MADA Entertainment and started promoting herself as an actress.

Her first appearance as an actress was in the drama series Big Thing in 2010. A year later, she took a role in her first-ever movie project titled Heartbeat.

From that point forward, she kept on showing up in a few drama series such as Pinocchio (2014), Jang Bo Ri Is Here! (2014), The Dramatic (2013), Play Guide (2013), and so on.

In 2018, she had her first villainous role in the drama series Secrets and Lies. She got a lot of praise for her amazing character portrayal.

The series has also earned her the Best New Actress award in the 2018 MBC Drama Awards ceremony, which is quite an achievement.

Read also: Oh Chang Seok – Biography, Profile, Age, Trivia, Family & Life Story


  • Real Name: Oh Se Mi (오세미)
  • Stage Name: Oh Seung Ah (오승아)
  • Also Known as: Oh Sung Ah
  • Nickname: Seung Ah (승아)
  • Birthday: September 13, 1988
  • Birthplace: Seoul, South Korea
  • Zodiac Sign: Virgo
  • Nationality: South Korean
  • Religion: –
  • Professions: Actress, Singer
  • Education:
    Seryun Middle School;
    Changduk Girls’ High School;
    Sejong University (Department of Film and Arts)
  • Hobbies: Reading books, studying Japanese
  • Parents: –
  • Siblings: –
  • Boyfriend: –
  • Facebook: –
  • Twitter: @Seunga0913
  • Threads: –
  • Instagram: @snowmanloveu
  • TikTok: –
  • YouTube: 오승아O’style

Height, Weight, & Physical Appearance 

  • Height: 168 cm (5’6”)
  • Weight: 45 kg (99 lbs)
  • Blood Type: A
  • Hair Color: Black
  • Eye Color: Black
  • Body Measurements: –
  • Shoe Size: –
  • Dress Size: –


  • Father: –
  • Mother: –
  • Brother: –
  • Sister: –

Boyfriend & Dating History

She has never been involved in any publicly known relationship nor rumored to date anyone. She most likely prefers to keep her personal and dating life out of the limelight.

Net Worth 

Even though the exact amount of her net worth is not known, multiple sources estimated her to have accumulated around $1 million to $5 million of net worth.

She appears to earn most of her income through working as an actress and singer in the South Korean entertainment industry.

Plastic Surgery

There is no known information on whether she has undergone any cosmetic surgery to change her visual appearance.


  • Seung Ah is a former member of the girl group RAINBOW.
  • She is a talent under MADA Entertainment.
  • When she is not busy with her acting schedule, she works as an editor at Application Pikicast.
  • Her shoe size is 250mm.
  • Seung Ah is friends with Kang Ji Young and the late Koo Ha Ra from the girl group KARA.
  • She joined the KBS children’s choir when she was still in elementary school.
  • Seung Ah was involved in a lot of musical stages during her high school days.
  • She used to be a lead vocalist in her former girl group.
  • Seung Ah can play the piano.
  • She likes flowers.
  • Seung Ah is a former trainee at SM Entertainment.
  • She is an only child.
  • Her ideal type is…

Read also: Han Ji Hyun – Biography, Profile, Age, Trivia, Family & Life Story


  • Drama Stage: My Wife’s Bed (tvN | 2019) – Lee Yi Na
  • Heartbeat (2011), as Girl Group Member

Drama Series

  • The Third Marriage (MBC | 2023-2024), as Jung Da Jung
  • Vengeance of the Bride (KBS2 | 2022), as Kang Ba Da
  • Young Lady and Gentleman (KBS2 | 2022), as Ahn Ji Min
  • The Second Husband (MBC | 2021), as Yoon Jae Kyung
  • A Good Supper (MBC | 2021), as Department Store VIP Customer
  • Love (ft. Marriage & Divorce) (TV Chosun | 2021), as Lee Yeon Hui
  • Bad Love (MBC | 2019), as Hwang Yeon Soo
  • Secrets and Lies (MBC | 2018), as Shin Hwa Kyung
  • Grand Prince (TV Chosun | 2018), as Queen
  • A Sea of Her Own (KBS2 | 2017), as Yoon Soo In
  • 88 Street (Naver TV Cast | 2016), as So Mi
  • Pinocchio (SBS | 2014), as the Interviewee of the MSC Examination
  • Jang Bo Ri Is Here! (MBC | 2014), as Choi Yoo Ra
  • The Dramatic (MBC every1 | 2013), as self
  • Play Guide (tvN | 2013), as self
  • The Clinic for Married Couples: Love and War (KBS2 | 2011), as Soo Yeong
  • Big Thing (SBS | 2010), as Mi Na

TV Shows

  • Don’t Be Jealous (MBC | 2020), as a guest
  • 5 Bros (JTBC | 2019), as a guest
  • Idol Room (JTBC | 2018), as a guest
  • Video Star: Season 2 (MBC every1 | 2018), as a guest
  • King of Mask Singer (MBC | 2015), as a guest
  • 2013 Idol Star Olympics Championships Chuseok Special (MBC | 2013), as a regular member
  • After School Club (Viki | 2013), as a guest
  • Real Men: Season 1 (MBC | 2013), as a guest
  • The Romantic and Idol: Season 1 (tvN | 2012), as a regular member
  • 2012 Idol Star Athletics – Swimming Championships (MBC | 2012), as a regular member
  • 2011 Idol Star Athletics Championships (MBC | 2011), as a regular member
  • Weekly Idol (MBC every1 | 2011), as a guest
  • Nazotoki Battle TORE (NTV | 2011), as a guest
  • 2010 Idol Star Athletics Championships (MBC | 2010), as a regular member
  • Let’s Go! Dream Team Season 2 (KBS2 | 2009), as a guest
  • Vitamin (KBS2 | 2003), as a guest
  • Pops in Seoul (Viki | 1998), as a guest


  • 2022 10th Broadcast Actors Awards – 10 People Who Shined Korea – The Second Husband
  • 2018 MBC Drama Awards – Best New Actress – Secrets and Lies


  • 2017 KBS Drama Awards – Excellence Award (Actress in a Daily Drama) – A Sea of Her Own


“I want to be a trusted actress. I want people to want to watch what I am in. It would make me so happy.”

“It’s not easy to find a best friend after Rainbow, but Seo Hae won is one of them. We talked a lot whenever we could, we drank coffee and even travelled here and there on our break days. I’m so happy to have found someone like her.”

“My manager and stylist are good to me. They take care of me and I am grateful. Also my parents, they have been a great help. I also realized while making this drama that I am quite long-lasting!”


Who is Oh Seung Ah?

She is a South Korean actress and singer.

Who is Oh Seung Ah’s real name?

Her real name is Oh Se Mi (오세미).

What makes Oh Seung Ah famous?

She initially gained fame as a member of former group Rainbow, before shifting her career into acting and appearing in drama series such as The Second Husband (2021-2022), Vengeance of the Bride (2022-2023), and The Third Marriage (2023-2024).

Where is Oh Seung Ah from?

She was born in Seoul, South Korea.

How old is Oh Seung Ah?

She was born in 1988, and she is 36 years old as of 2024.

When does Oh Seung Ah celebrate her birthday?

She celebrates on the 13th of every September.

How tall is Oh Seung Ah?

Her height is 5’6″ or 168 cm.

Who are Oh Seung Ah’s parents?

She did not reveal the names of her father and mother.

Is Oh Seung Ah married?

She is not married. Furthermore, there is no information on whether she is in a relationship or not.

Who is Oh Seung Ah’s ex-boyfriend?

Her ex-boyfriend is not known.

How rich is Oh Seung Ah?

Her net worth is around $1 million to $5 million.

What is Oh Seung Ah’s nationality?

Her nationality is South Korean.

Oh Seung Ah is the type of person who will succeed at everything she puts her mind to. Her versatility is what makes it impossible for her to dabble in different projects at once.