Showing their determination to film for their drama, the cast of "The Heirs" bravely face the cold weather in BTS stills.

Lee Min Ho showed his 'big brother' side by providing the cast and staff with neck warmers, hot packs and warm drinks, and he impressed everyone with his consideration towards their welfare. He was also seen fighting the cold by wearing a bright red jacket while filming.

The female members of the cast were seen wrapped up in blankets during their breaks, especially since they wear thin skirts for their uniform. Park Shin Hye showed her professionalism by braving the cold without warmers while filming, and Kim Ji Won impressed her fans by continuously practicing her lines and never letting go of her script.

ZE:A's Hyungsik did his part in boosting the energy during filming by going around and making the people on set laugh with his jokes and funny antics. He also uses his breaks to take short naps to regain his stamina.

Representatives from the drama said, "The cast of 'The Heirs' have been dutifully working even in the cold because of their dedication towards the drama. As the temperature starts to drop, the tension and romance becomes hotter in the coming episodes."

Support your favorite "The Heirs" characters by tuning in every Wednesdays and Thursdays at 10PM KST on SBS.

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