Yoo Ah In to appear on 'Running Man'

A rep from the show revealed on the 3rd that Yoo Ah In and  his 'Tough as Iron' co-star Kim Hae Sook are in the middle of filming and that both are showing that they're eager to win the race. 

'Tough as Iron' premieres in theaters on October 2 KST. Are you excited to see Yoo Ah In on the 'Running Man'! How do you think he'll do?