Lee Jung Jae marked his birthday on December 15 with a gym celebration. He shared a picture on Instagram, posing with a cake brought by his team. His ‘Squid Game’ co-star, Gong Yoo, was seen lying on the floor, capturing the moment as a passionate photographer. Fans praised Gong Yoo’s skills and Lee Jung Jae’s youthful appearance. In another post, Lee Jung Jae expressed his gratitude for the love shown by his fans.