  The Higgs sector of the Standard Model offers a unique opportunity to probe
the hidden sector. The Higgs squared operator is the only dimension two
operator which is Lorentz and gauge invariant. It can therefore couple both to
scalar curvature and the hidden sector at the dim--4 level. We consider the
possibility that a combination of the Higgs and a singlet from the hidden
sector plays the role of inflaton, due to their large couplings to gravity.
This implies that the quartic couplings satisfy certain constraints which leads
to distinct low energy phenomenology, including Higgs signals at the LHC. We
also address the unitarity issues and show that our analysis survives the
unitarization procedure.
