  We study the top pair production cross section at the LHC in the context of
Randall-Sundrum model including the Kaluza-Klein (KK) excited gravitons. It is
shown that the recent measurement of the cross section of this process at the
LHC restricts the parameter space in Randall-Sundrum (RS) model considerably.
We show that the coupling parameter ($\frac{k}{\bar{M}_{pl}}$) is excluded by
this measurement from 0.03 to 0.22 depending on the mass of first KK excited
graviton ($m_1$). We also study the effect of KK excitations on the spin
correlation of the top pairs. It is shown that the spin asymmetry in $t\bar{t}$
events is sensitive to the RS model parameters with a reasonable choice of
model parameters.
