Staff shared two images featuring singer/actress IU wearing big sunglasses with a rather serious expression dressed in black.

Another photo consisted of the idol star zoning out while sitting at her office desk.  Playing the role of a stern, cold character Lee Ji Ahn, many are looking forward to IU's transformation via the small screen.

SEE ALSO: IU channels 4 unique 'Persona's in still cuts for her upcoming 4-part short film series

Staff commented, "Actress Lee Ji Eun (IU's real name) has undergone the most drastic transformation for this series.  She perfectly portrayed the role of a woman who has stood firm in the midst of a harsh reality. Please look forward to her side of the story on 'My Mister.'"

Meanwhile, 'My Mister' will be premiering on March 21.