The lead actresses Moon Hee NA and Eun Kyung SHIM have the same ages in real life as the respective ages they play in the film.
Other remade versions of 2014 Korean-made "Miss Granny" include the 2016 Japanese remake called "Sing My Life," ("Ayashii Kanojo"), starring Mikako Tabe (b.1989) in Shim Eunkyung's (b. 1994) lead role, and a 2015 Chinese remake called "20 Once Again, ("Chong fan ershi sui"), starring Yang Zishan (b. 1986) in the lead role.
Mal-soon uses Coty Airspun Loose Face Powder before having her picture taken.