Girls' Day Sojin will start her acting career in a new drama.

Sojin has been casted for the upcoming drama for TV Chosun 'The Greatest Marriage' as a prominent character.

'The Greatest Marriage' is about the current looks of marriage and people who wish to have kids but not marriage.

Sojin was casted as Lee Yuri, a recent college graduate who was born in a rich family with a fun personality and nice body. She treats her cousin Hyunmyoung (Uhm Hyun Kyung) like a slave, but still listens to all her problems and helps her solve them.

Girls' Day is currently on top of the charts with their new song 'Darling.' Sojin is hoping to relay the success of Girls' Day onto her new acting opportunity.