In his recent film "Bogota: City of the Lost," Song Joong-ki has drawn significant attention, not only for the film but also for how the actor underwent such a remarkable transformation.

Promotional events have become active with its release scheduled for the end of December in theaters in South Korea.

Song's Guk Hee in "Bogota" begins as a struggling young writer but climbs to success in the wake of the IMF financial crisis and in a foreign land.

Things are hardly glamorous, as the story unfolds over Guk Hee with a variety of trials that include a robbery that strips his family of everything when they arrive in Colombia.

According to Kbizoom, what has captivated audiences and critics alike is Song's striking appearance throughout the film.

The actor, who has maintained his boyish appearance, is apparently unchanged in the movie even though his character's life covers years.

And although his hair, clothes and darker complexion signal the character's evolution, many have pointed out that Song looks as if he has not aged a day since featuring in "The Battleship Island" seven years ago.

"The resemblance is uncanny," said a fan who attended a recent screening at the Busan International Film Festival. "He same as good now, if not better," another said.

But following its festival debut, the film has garnered mixed reviews from critics. Some journalists have raised concerns about the film's script and settings, while others have said Song doesn't give his best performance here compared to his earlier work.

Even while facing these criticisms, "Bogota" is viewed as an important project for him, particularly coming very much on the heels of a time when he himself was under the spotlight with regards to his personal life. Many are hoping this film can restart his career.

As "Bogota: City of the Lost" nears its theatrical release, fans are left curious to see how his performance will be received by the masses.