Not only does "Oh My Venus" have So Ji Sub playing a shapely physical trainer and Shin Min Ah playing his out-of-shape love interest, the rest of the drama cast is shaping up nicely too.

In "Oh My Venus" So Ji Sub plays the celebrity trainer Kim Young Ho. Shin Min A plays the frazzled, frumpy lawyer Kang Joo Eun. She was once known for her svelte good looks but she's gained a lot of weight since high school. Losing self-confidence and facing health issues, she hired Kim to help change her life.

The drama also stars Yoo In Young as the woman whose physical transformation and new self confidence inspires Shin Min Ah's character to start working out. And the extremely personable actors Henry Lau and Jo Eun Ji have signed on for roles in the drama. Henry Lau of Super Junior M will play So Ji Sub's likable American friend. Henry recently appeared in the drama "Persevere Goo Hae Ra" while Jo Eun Ji has more drama experience. She displayed comic charm in such dramas as "Personal Taste" and "Falling for Innocence. Jo Eun Ji will play Shin Min Ah's friend and confidante.

Sung Hoon, who had a breakout role in the recent drama "Noble My Love," is the most recent addition to the cast. Sung will play another popular personal trainer, So Ji Sub's rival in work and love. Sung knows all about staying in shape. The 32-year-old actor was a professional swimmer until an injury made it difficult for him to compete. He turned to acting, debuting in 2011 in "New Tales of the Gisaeng." He also had a role in "Faith: The Great Doctor" with Lee Min Ho.

He will have something in common with So Ji Sub, who trained for a career as a professional swimmer before he began modeling.

Jung Gyu Woon, who appeared in "Wonderful Mama," "God's Gift - 14 Days" and "Birth of a Beauty" signed on for an as yet undisclosed role in "Oh My Venus."