Even Yoo Ah In was flustered by�Kim Tae Hee's beauty.

On the April 3rd broadcast of SBS' 'One Night of TV Entertainment', the actor commented on his co-star who he plays opposite of in the new SBS drama, 'Jang Ok Jung'.

Yoo Ah In said, "To be honest, while acting, I would let my guard down and steal glances at her. I mean she is Kim Tae Hee," sharing how he too was captivated by the actress' beauty.

Kim Tae Hee waved her hands and said, "What are you talking about? While acting with Yoo Ah In, I forgot my lines because of his intense eyes."

'Jang Ok Jung' airs its first episode on April 8th.