Dex is preparing for his acting debut and recently sought guidance from actor Lee Si Uhn. 

On the episode of MBC TV's variety show 'Born to Travel the World Season 3,' Dex shared his concerns about acting with Lee Si Uhn, saying, "I somehow ended up acting, and I’m worried about how to maintain my mental state. I think I might be too nervous." Dex will make his debut as an actor in the horror mystery series 'Tarot' produced by 'STUDIO X+U'.

Lee Si Uhn advised, "There is a good method – act as if you will never see the audience again. Just push forward with your personality." Despite continuous worries expressed by Dex about his ability to perform well, Lee Si Uhn encouraged him, emphasizing the importance of a stable mindset and physical fitness. He even offered to visit the set and suggested reading the script together in Korea to lend support.

In an interview with the production team, Dex expressed his gratitude, saying, "I thought Lee Si Uhn would laugh at me, but he was very supportive and offered to help." On the other hand, Lee Si Uhn humorously remarked, "I think I like Dex. I didn't expect to take a liking to him so quickly." This exchange, viewed on VCR, prompted a comment from Ki-an 84, "It's the final choice."