Mark Pellegrino plays Jacob in the TV series Lost.

Quick Scoop

  • The character Jacob is the mysterious leader tied to the Island’s deeper mythology, first fully appearing in the season 5 finale, “The Incident.”
  • Mark Pellegrino, an American actor born in 1965, portrays Jacob and is also known for roles in Supernatural , Dexter , and 13 Reasons Why.

In many fan discussions and forums, Jacob is often debated as a morally gray “protector” rather than a straightforward hero or villain, which keeps the character trending in Lost conversations even years after the finale aired.

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