On the AMC website you can find some information about Colin’s role as Father Gill in the Cast & Crew section as well as a short text about his career which is located here: Mad Men > Cast & Crew > Colin Hanks.
The text mentions:
Colin Hanks has quickly become one of Hollywood’s most sought-after actors. His natural talent and raw energy have quickly secured his place as one of Hollywood’s young leading men. Having now completed production on Oliver Stone’s biopic W (a film chronicling the life and presidency of George W. Bush), he can also be seen in the ensemble comedy The House Bunny starring opposite Anna Faris and the Diane Lane thriller Untraceable from director Gregory Hoblit.