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.

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.