For my application group, the field was cut to 9 before any interviews and then phone screening cut it to 8. The in-person interview consisted of four 45 minute interviews with the four departments. For the most part it's just resume review, but there are a few situational questions. I would recommend knowing the company and coming prepared to go over excel and probability skills to some extent.

Applied online. Had initial phone interview with an actuary. Invited for an on-site interview (four 30 minute interview with two actuaries at a time). Mostly going over resume and some behavioral questions. They wanted to know how comfortable I was with excel.