If the chemistry is not right in a kdrama, the romance is not going to work. When watching a mismatched kdrama couple, it's tempting to think which actor you might have cast instead. Why did they choose that actress and not the other obvious choice?

Sometimes actors are cast for their star power, sometimes because the scriptwriter asked for them. Occasionally, a couple is cast because they look good together, but when acting, they lack that spark. You can never tell what will work out on screen. But it is fun to imagine who might be great together.

Here are a few kdrama couples that could really work:

Yoon Eun Hye and Ok Taecyeon: They did a beer commercial together and looked great as the idol manager and detective. They both have the same intense good looks. She's four years older than him, but why should a few years matter when you're casting a drama? Yoon Eun Hye looked great with all her drama co-stars. She made a great couple with Gong Yoo in "Coffee Prince," Joo Ji Hoon in "Princess Hours," Woon Sang Hyun in "My Fair Lady," Kang Ji Hwan in "Lie to Me," and Park Yoo Chun in "Missing You." She even had a short cameo appearance as the former girlfriend of Lee Min Ho in "Personal Taste."

Taecyeon has not had that many small screen girlfriends, only Suzy in "Dream High" and almost Moon Geun Young in "Cinderella's Sister," but Yoon Eun Hye could show him how it's done.

Next suggestion is Kim Sun Ah and Jung Il Woo. Okay, he's 25 and she is 37, but she starred with Lee Jang Woo in "I Do, I Do" and he is 26. There must be some way she could be in the same drama with Jung Il Woo. She has romanced Hyun Bin in "My Lovely Kim Sam Soon" and Lee Dong Wook in "Scent of a Woman."

Jung Il Woo has been matched up with Lee Chung Ah in "Flower Boy Ramen Shop," longed for Han Ga In in "The Moon Embracing The Sun" and lost Nam Gyu Ri in "49 Days." Please, kdrama producers, make this happen.

And finally, how about Suzy Bae and Lee Min Ho? After she finishes fighting her way through "Gu Family Book," she could become Lee Min Ho's sidekick in another "City Hunter" type action drama. She's 18 and he is 25, but she is pretty tough. She stuck it out in that tough performing arts high school in "Dream High" and held her own in "Big." She has enough spirit to defeat the most arrogant character he could play. Goo Jun Pyo, beware. So far, he has been matched up with Son Je Jin in "Personal Taste," Go Hye Sun in "Boys Over Flowers," Park Min Young in "City Hunter," Kim Hee Sun in "Faith" and his new drama, "The Heirs" will feature Park Shin Hye as his love interest.

Do you have any actors and actresses you would like to see in a kdrama together? Let us know.