Ryu Jun Yeol and Hyeri grew close during their collaboration on 'Reply 1988' in 2015.
Their relationship, rumoured to have started in 2016, was officially acknowledged by their agencies in August 2017.
In a November 2019 interview, Hyeri revealed that despite busy schedules, they were happily dating and saw each other frequently.
With a seven-year age difference, Jun Yeol being 34 and Hyeri 27, the couple kept their relationship private.
Despite breakup rumours, photos of Hyeri and Jun Yeol on a restaurant date surfaced in June 2021.
On November 13, both C-JeS Studios and Creative Group ING confirmed the couple's breakup after social media reports circulated.