Yoon Si Yoon showed off his drastic weight loss in still cuts for 'Prime Minister and I'.

SEE ALSO: YoonA pretends to be drunk with Lee Bum Soo in BTS photos for 'Prime Minister and I'

Yoon Si Yoon received attention for his more defined V-line and slimmer figure in the still cuts and it has been reported that he lost 7 kg (~15 lbs.) for the drama. Yoon Si Yoon looked both cute and charismatic in his various suits and made fans anticipate his love triangle with YoonA and Lee Bum Soo as elite agent Kang In Ho.

'Prime Minister and I' will premiere on the 9th!