Both On and Jo starred in tvN's drama "Ingyeo Gongju (literally meaning surplus princess)."
The 32-year-old On starred in the film "The Peter Pan Formula" and appeared in "My Mighty Princess," "Twelve Men in a Year" and "The Five." Jo, who is eight years younger than On, stars in OCN's drama "Missing Noir M" which will begin airing on March 28.