  We present the next-to-leading order (NLO) electroweak (EW) corrections to
the top quark pair production associated with a hard photon at the current and
future hadron colliders. The dependence of the leading order (LO) and NLO EW
corrected cross sections on the photon transverse momentum cut are
investigated. We also provide the LO and NLO EW corrected distributions of the
transverse momentum of final top quark and photon and the invariant mass of top
quark pair and top-antitop-photon system. The results show that the NLO EW
corrections are significant in high energy regions due to the EW Sudakov
effect.
