Motivated by the hierachy and/or fine tuning problem in the Standard 
Model, it has been realized that extra dimensional models could provide
alternative solutions to the problem simply by bringing quantum gravity
scale down to the energy as low as TeV scale.  With the quantum gravity
scale as low as TeVs, phenomenological implications at the particle
colliders are profound, it has been estimated that effects of
Kaluza-Klein(KK) graviton exchange and emission into the extra dimension
could be appreciably large at the CERN Large Hadron Collider(LHC). Up to
date, string theory is the only candidate that incorporate quantum
gravity into a unified framework with other quantum gauge interactions.
We therefore investigate the effect of stringy corrections to the well
known Standard Model Electroweak processes such as dilepton and diphoton
productions at the Fermilab Tevatron and LHC. Invariant mass
distributions, angular distributions as well as Forward-Backward
asymmetry show remarkably unique signatures of the stringy kinematics
which could be distinguished from other new physics signals such as Z'
and KK particles.  Finally the reach on the string scale at the LHC has
also been estimated.