Yook Sung-jae

Aside from his group's activities, Yook has acted in television dramas Reply 1994 (2013), Plus Nine Boys (2014), Who Are You: School 2015 (2015), The Village: Achiara's Secret (2015), Guardian: The Lonely and Great God (2016), Mystic Pop-up Bar (2020) and The Golden Spoon (2022).

He has appeared in several reality shows, including: Hitmaker, We Got Married, and Master in the House.

Yook Sung-jae (born May 2, 1995), also known mononymously as Sungjae, is a South Korean singer, songwriter, actor, host and entertainer.

He is a member of the boy group BtoB and its sub-group, BtoB Blue.

Yook was born on May 2, 1995, in Yongin, Gyeonggi Province.

He has one older sister.

Yook comes from a business family.

His father is the CEO of an IT corporation that deals with semiconductors.

His grandfather was the first to introduce red carp in South Korea, while his grandmother operated a fishing farm in Paju.

He briefly studied for a month in England and the Philippines, respectively.

On August 10, 2010, he participated in the stage performance of "2010 Cube Stars Party".

On March 6, 2011, Yook also participated in the stage performance of "2011 CUBE Stars Party" with bandmate Seo Eunkwang, Im Hyun-sik, Jung Il-hoon, and supposed to be member Lee Min-woo.

Yook entered the JYP 6th Audition Final Round before joining his current agency, Cube Entertainment.

Yook made his debut as a vocalist of BtoB with "Insane" and "Imagine" on March 21, 2012.

On March 23, 2012, Yook co-host SBS MTV's music program The Show alongside bandmate Lee Min-hyuk.

In 2013, Yook Sungjae started his first ever acting debut in drama Monstar (TV series) as part of the supporting cast alongside his bandmates Lee Min-hyuk, Lee Chang-sub and Im Hyun-sik.

Sungjae acted as Arnold, a member of boy idol group 'Men In Black'.

He appeared in 4 episodes in total, episodes 2, 6, 9, and 12.

He, with BTOB's Lee Minhyuk, Lee Changsub, Im Hyunsik and Beast's Yong Jun-hyung were featured in the drama OST Part 1 titled "Days Gone By", OST Part 2 "After Time Passes", and OST Part 7 "First Love".

In the same year, Sungjae and BTOB made a cameo appearance in hit drama The Heirs episode 4 as themselves, an idol group band BTOB.

He completed his high school education at Hanlim Multi Art School, graduating in 2014.

He then attended Dongshin University, majoring in Practical Music.

In 2014, Yook appeared in the television series Reply 1994 as Sungjoon/Ssukssuk, Na-jung's little brother.

In July 2014, Yook was cast as a presenter for the program, A Song For You alongside Kangin of Super Junior and Amber of f(x).

He also participated in the program Hitmaker season 1, presented by South Korean producer duo Jeong Hyeong-don and Defconn and became part of the program's project unit group, Big Byung, together with Got7's Jackson and VIXX members, N and Hyuk.

The group then releases two singles: "Stress Come On" and "Ojingeo Doenjang" (Korean: 오징어 된장).

The same year, he received his first main acting role in Plus Nine Boys, playing a 19-year old Judo athlete.

He then joined the reality-variety program Real Men from 2014 to 2015.

Yook achieved his breakthrough when he landed a leading role in the teen drama Who Are You: School 2015, alongside Kim So-hyun and Nam Joo-hyuk.

He also released an OST for the show, "Love Song" with Park Hye-soo.

After the series ended, he experienced a rise in popularity and landed several endorsement deals.

Yook then starred in the horror mystery series The Village: Achiara's Secret alongside Moon Geun-young in 2015.

He received the "New Star award" for his performance in The Village: Achiara's Secret, and won "Best Couple award" with Kim So-hyun for Who Are You: School 2015.

In 2015, Yook joined King of Mask Singer, competing under the alias Tired Bumblebee, and received good feedback for his performance.

He was paired up with Red Velvet's Joy in the fourth season of reality show We Got Married.

The couple went on to release a duet titled "Young Love", with the pair contributing to the lyric composition of the song with the help of his bandmate BTOB's Im Hyun-sik as the producer.

At the 2015 MBC Entertainment Awards, Yook received the "Best Couple award" alongside Joy and the "Best Male Rookie (in Variety) award".

In September 2015, Yook became one of the trio main hosts Yook Sungjae-GOT7's Jackson Wang-and actress Kim Yoo-jung of the music-program Inkigayo and left the show in May 2016.

The couple departed from We Got Married on May 7, 2016.

Yook released his debut solo album, Yook O'Clock, on March 2, 2020.