f(x)'s Krystal is receiving love for her irresistible aegyo on 'Heirs', but who knew she had an onscreen brother who is just as cute, Lee Hyun Jin!

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His agency Jstars Entertainment confirmed the cameo on December 11, "Lee Hyun Jin will appear as Lee Bo Na's (Krystal) older brother on the 19th episode of 'Heirs'."

The actor shared, "I have ties with PD Kang Shin Hyo, so I decided to make the cameo without hesitation. I am devoted fans of PD Kang Shin Hyo and writer Kim Eun Sook. It is an honor for me to work with the two of them for their production 'Heirs'."

Lee Hyun Jin will add even more eye candy to the drama as a character who returns to Korea from his studies in New York and showers Lee Bo Na with his brotherly love, even teasing her about her boyfriend Yoon Chan Young (CNBLUE's Minhyuk).

Catch Lee Hyun Jin's cameo on 'Heirs' on the 11th at 10 PM KST!