Matt Damon and Jon Hamm to Appear on 30 Rock Live

This weeks episode of 30 Rock is going to kick a**!

Matt Damon is set to return as Tina Fey's emotionally unstable boyfriend and Jon Hamm is also rumored to make a special cameo.

NBC is trying really hard to keep the details of the episode under wraps, but Entertainment Weekly reports the episode will revolve around a taping of the fictional live variety show TGS.

Set your Tivo's for this Thursday, it's going to be a good one!