Lee Min Ho, Park Shin Hye, and Minhyuk all share the same A blood type as revealed in a making film for 'Heirs'.

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The making film showed that the atmosphere on the set of the pancake house was quite cheerful compared to what was shown onscreen with Park Shin Hye brightening up the set with her uncontrollable laughter. Lee Min Ho started the conversation by commenting, "Jin Hyuk hyung looks like he would be a B or O blood type", to which Park Shin Hye added, "Krystal is blood type A."

Park Shin Hye then found out that her, Lee Min Ho, and Minhyuk all share the same blood type and shared to the director, "I have an amazing truth. We're all blood type A", and the director also joined the club by revealing, "I am also blood type A", making Park Shin Hye laugh in surprise at the coincidence.

Watch the making film above!