The sought-after stars are playing husband and wife in the film, which will kick off in September.
Based on the best-selling book of novelist Kim Ae-ran, the film portrays the lives of teenage parents and their son suffering from progeria.
Kang will play a 33-year-old father with a 16-year-old son while Song will play a 17-year-old mother who once dreamed of becoming an idol but ended up getting pregnant at an early age.
The film is attracting a great deal of attention by featuring the two stars, who were mired in a love scandal last May. Rumors that they are dating surfaced in May after they were sighted together in Paris. But they dispelled the rumor, saying that their trip to the romantic city was solely for a photo shoot.
By Ock Hyun-ju (firstname.lastname@example.org)