  In this paper, we study the entanglement entropy in a large class of states
of two-dimensional conformal field theory in the the large central charge
limit. This class of states includes the states created by the insertion of a
finite number of local heavy operators. By using the monodromy analysis, we
obtain the leading order entanglement entropy for the general state. We show
that it is exactly captured by the Ryu-Takayanagi formula, by using the
Wilsonian line prescription in the Chern-Simons formulation of the AdS$_3$
gravity.
