  The prospects for discovering Higgs particles and studying their fundamental
properties at future high--energy electron--positron and photon-photon
colliders are reviewed. Both the Standard Model Higgs boson and the Higgs
particles of its minimal supersymmetric extension are discussed. We also
comment on a two Higgs doublet model searches at LEP 1. We update various
results by taking into account the value of the top quark mass obtained by the
CDF Collaboration and by including radiative corrections.
