  To date, magnetic proximity effect (MPE) has only been conclusively observed
in ferromagnet (FM) based systems. We report the observation of anomalous Hall
effect and anisotropic magnetoresistance in angular dependent magnetoresistance
(ADMR) measurements in Pt on antiferromagnetic (AF) $\alpha$-Fe$_2$O$_3$(0001)
epitaxial films at 10 K, which provide evidence for the MPE. The N\'eel order
of $\alpha$-Fe$_2$O$_3$ and the induced magnetization in Pt show a unique ADMR
compared with all other FM and AF systems. A macrospin response model is
established and can explain the AF spin configuration and all main ADMR
features in the Pt/$\alpha$-Fe$_2$O$_3$ bilayers.
