Students come from countries all over the world to study at Western. For complete information on the application procedure, see the International Students site.
Western has many exchange programs with universities around the world. Students registered at a foreign university can study at UWO for a term or a year, and Western students can similarly study abroad. The Student Development Services Exchange Programs web site has listings of exchange destinations and application procedures.
The School of Graduate and Postdoctoral Studies also provides lots of useful information for how to prepare for Western as an international student.