  We investigate the entanglement entropy in the Integer Quantum Hall effect in
the presence of an edge, performing an exact calculation directly from the
microscopic two-dimensional wavefunction. The edge contribution is shown to
coincide exactly with that of a chiral Dirac fermion, and this correspondence
holds for an arbitrary collection of intervals. In particular for a single
interval the celebrated conformal formula is recovered with left and right
central charges $c+\bar{c} =1$. Using Monte-Carlo techniques we establish that
this behavior persists for strongly interacting systems such as Laughlin
liquids. This illustrates how entanglement entropy is not only capable of
detecting the presence of massless degrees of freedom, but also of pinpointing
their position in real space, as well as elucidating their nature.
