But when the actors were paired as a couple for "Pinocchio," which kicked off in mid-November last year, Park worried they wouldn't suit each other on screen.
"Jong-suk is good-looking, but people said we wouldn't complement each other (as a couple), maybe because my double eyelid folds are thick and I have big eyes," said Park, who previously won plaudits in 2013 high school drama "The Heirs" opposite actor Lee Min-ho.
Those remarks soon subsided, however, as soon as the drama series took to the air.
"Perhaps we suited each other more than was expected," said Park.
Lee, also 25, was less concerned, saying he trusted Director Jo Soo-won's casting choices.