In 2013, at the age of eighteen, Lee Tae-hwan made his official acting debut in the short TV series titled
After School: Lucky or Not together with the members of
5urprise. He next starred in
High School King of Savvy, portraying an ice hockey player， and also played the younger version of Lee Deok-wa in the 2-episode SBS drama
Wonderful Day in October. In 2014, Lee starred in
MBC drama
Pride and Prejudice, where he played an investigator and former
taekwondo athlete. Lee's then starred in his first period drama,
Splendid Politics in which he played young
Prince Gwanghae. In 2016, Lee became known for his role in
Come Back Mister, where he played a former gangster and bodyguard. He next starred in
MBC fantasy thriller
W, playing a martial arts instructor. The same year, he was cast in the Korean-Chinese web-drama
Thumping Spike, where he played a volleyball captain. Lee also made his big screen debut in the
Su Saek, a film depicting about the friendship among young men. From 2016 to 2017, Lee was cast in
MBC's weekend drama ''
Father, I'll Take Care of You, a 50-episode family drama in which he portrayed one of the unmarried sons. He then starred in another weekend drama My Golden Life'' from 2017 to 2018, playing an industrial design student. The drama was a hit with over 40% ratings, and led to a rise in popularity for Lee. In 2018, Lee was cast in tvN's romantic comedy drama ''
What's Wrong with Secretary Kim'', playing a famous author. In 2019, Lee starred in SBS youth drama ''Farmers' Academy'', playing a first year student at the Department of Food crops. ==Personal life==