- Dominic Monaghan as Meriadoc "Merry" Brandybuck: a distant cousin of Frodo.
- Orlando Bloom as Legolas Greenleaf: a prince of the elves' Woodland Realm and a skilled archer.
- Christopher Lee as Saruman the White: the fallen head of the Istari Order who succumbs to Sauron's will through his use of the palantír.
- Hugo Weaving as Elrond: the elven Lord of Rivendell who leads the Council of Elrond, which ultimately decides to destroy the Ring.
- Sean Bean as Boromir: a prince of the Stewards of Gondor who journeys with the Fellowship towards Mordor.
- Ian Holm as Bilbo Baggins: Frodo's uncle who gives him the Ring after he decides to retire to Rivendell.