I'm assuming you're referring to the 2003 South Korean film "Oldboy" and its Tamil dubbed version that might have been released or discussed in 2021.

If you wish to experience Oldboy without resorting to fan dubs:

A major challenge with dubbing older foreign films is the voice cast. The 2021 Tamil version managed to capture the weary, aged desperation of the protagonist. The voice actor didn't try to mimic the typical "heroic" baritone but instead matched the protagonist's exhaustion, which added to the authenticity of the experience.

: Listed as having Tamil audio options for the 2003 film.

Even in the dubbed version, the technical prowess of Park Chan-wook remains untouched.

If you are a fan of directors like Vetrimaaran or Mysskin, and you enjoy cinema that challenges you rather than just entertains you, the Tamil dubbed version of Oldboy is an essential watch. It proves that great storytelling, no matter the language or year of release, is timeless.