  The radion may be the lightest new state present in the Randall-Sundrum(RS)
model. We examine the couplings of the radion to the Standard Model(SM) fields
in the scenario where they propagate in the bulk and expand into Kaluza-Klein
towers. These couplings are then contrasted with those of the more familiar
case where the SM fields are confined to the TeV brane. We find that the
couplings of the radion to both $gg$ and $\gamma\gamma$ can be significantly
different in these two cases. Implications for radion collider phenomenology
are discussed.
