Hong began his entertainment career in 2007 as a professional
model. He made his acting debut in 2008, and has appeared in the romantic comedy
Oh! My Lady (2010),
sitcom Vampire Idol (2011), followed by supporting roles in
Jeon Woo-chi (2012) and
Dating Agency: Cyrano (2013). In 2014, Hong was cast in his first leading role in the cable series
Her Lovely Heels, followed by the
melodrama Mama. He also joined the
fourth season of
reality show We Got Married, pairing up with
Girl's Day member
Yura. Hong next starred in the
romantic comedy film
Enemies In-Law and
horror film Alice: Boy from Wonderland in 2015, followed by historical drama
Moon Lovers: Scarlet Heart Ryeo in 2016. In 2017, he co-starred in historical melo-romance drama
The King in Love. In 2018, he was cast in the romantic comedy drama
My Absolute Boyfriend, based on the
Japanese manga series of the same name. He is also set to star in the time-loop drama film
Spring, Again. In March 2019, Hong is confirmed to star in the weekend drama
Mother of Mine. Hong enlisted for his mandatory service on December 2, 2019. After discharge from military service In October 2021, Hong attended the What We Lost Vol.2 photo exhibition as a photographer. In 2022, Hong returns to the original
TVING drama
Stock Struck, after his discharge from the military. In September 2023, Hong signed with new agency Secret ENT. ==Filmography==