Dramas that aren't Korean but have Korean actors?

What are some good dramas that have at least one Korean actor but aren't Korean? 
I've heard of some actors being in sometimes Chinese or Japanese dramas. Any good recommendations? =) Thank you!

Skip Beat has two members from Super Junior as two of the male leads

Hayate the Combat Butler the female lead is Korean

Absolute Boyfriend the female lead is Korean

These are all Taiwanese, and I believe they all are dubbed. I've only seen Skip Beat so I can't say if the other two are good, but I really liked Skip Beat.

A couple others I know of are Absolute Boyfriend with Gu Hye Seon (Taiwanese) and Diamond Lover with Rain (Chinese), though I haven't seen either as I mostly just watch Korean dramas. There's also the upcoming Chinese Hero Zhao Zi Long with Yoona (Chinese).

Good Life ~Arigatou, Papa. Sayonara~ - Jung Woo Sung (ep. 6,7)

Fabulous boys ..not 100% sure this counts though as although he is Korean by birth, he's mostly acts in tdramas

Mischievious Princess (and it's spin off) is an ancient Chinese series and stars Jang Nara. It's also a really good drama, very funny and cute as well. 

There's also the Chinese drama Flowers in Fog with Joo Jin Mo