  In their comment Calandra \textit{et al} \cite{Calandra}, assert two points:
(1) the estimate of charge transfer from Li to graphene layers in LiC$_6$ in
our letter \cite{Pan2011c} is incorrect because of the three dimensional (3D)
character of the electronic structure in bulk LiC$_6$; (2) our main claim that
the superconductivity in graphite intercalation compounds (GICs) is
graphene-sheet-driven is therefore invalid.
