In Son Jun-ho's debut as the lead actor in the film "A Star Is Born," he showcased his talent and passion for acting. With a strong foundation in acting, Son has been preparing himself for this role for quite some time.

The film revolves around the story of Jack (played by Son), who is struggling to find his place in the world after losing his job and girlfriend. Jack's journey starts when he meets Sarah (played by the actress Yoon So-hee) at a charity event and they fall in love. However, their relationship is complicated due to their different backgrounds and personalities.

As the movie progresses, Son's performance becomes more intense and emotional. His portrayal of Jack is a standout, showcasing his range and versatility as an actor. He not only delivers heartfelt lines but also manages to convey complex emotions through his performances.

One of Son's most impressive moments comes when he takes on the role of Jack's estranged father, played by the actor Park Joo-seok. Son's portrayal of the character is nuanced and realistic, capturing the pain and hurt that Jack feels. The scene between Son and Park Joo-seok is emotionally charged and portrays the depth of their relationship.

Furthermore, Son's chemistry with Yoon So-hee as Sarah is also commendable. Their on-screen partnership is infectious and creates a bond between them that transcends their roles. The chemistry between the two actors adds to the overall appeal of the film.

Overall, Son Jun-ho's performance in "A Star Is Born" is a testament to his talent and dedication to acting. His portrayal of Jack is both heartwarming and poignant, while his chemistry with Yoon So-hee is a highlight of the film. As the film progresses, it is clear that Son has what it takes to become a rising star in the entertainment industry.