Illinois released its first official depth chart for the 2013 season, so even though we've had a good idea for a few weeks, now we can officially say we know who the starters are. And, since he's listed at third on the depth chart, we also know that the Illini don't plan on redshirting Aaron Bailey this fall.
Bill Cubit basically said as much today.
Anyway, here's the depth chart. Bold denotes starter, italics denote freshmen (redshirt or true).
RT: Corey Lewis / Patrick Flavin
SS: Earnest Thomas / Zane Petty / Davontay Kwaaning
KR: Miles Osei / V'Angelo Bentley / Josh Ferguson / Ryan Lankford
PR: V'Angelo Bentley / Miles Osei / Martize Barr
As you can see, there's still some question as to whom will start at both tight end and the STAR position. Also, while there's plenty of freshman on the second and third tier of the depth chart, you'll notice that Taylor Barton is the only freshman in the starting lineup, though it is his second year with the team.
Also, I wouldn't be very surprised if Darius Mosely makes his way on the field in certain situations.