Yes it's possible. Check out this thread: http://britishexpats.com/forum/showthread.php?t=645800&highlight=pixar
You might find this link useful - http://www.pixar.com/companyinfo/jobs/index.html Pixar have very high standards, and obviously it depends on what area of the company you're trying to get into, but I have a friend who's doing animation, and I know that Pixar are quite strict on what degree you have if you want to get into their animation department!
Walt disney feature animation also do them in many different areas if that is your forte... specifically for students studying a program related to animation/film... http://www.disneyanimation.com/careers/student_programs.html As an international though, You are recommended to apply extra early because of the visa process and everything.