  The replica wormholes are a key to the existence of the islands that play a
central role in a recent proposal for the resolution of the black hole
information paradox. In this paper, we study the replica wormholes in the JT
gravity, a model of two-dimensional quantum gravity coupled to a non-dynamical
dilaton, by making use of the 2$d$ conformal field theory (CFT) description,
namely, the Liouville theory coupled to the $(2,p)$ minimal matter in the
$p\to\infty$ limit. In the Liouville CFT description, the replica wormholes are
created by the twist operators and the gravitational part of the bulk
entanglement entropy can be reproduced from the twist operator correlators. We
propose the precise dictionary and show how this correspondence works in
detail.
