Yes, that's John Slattery. He guest stars on this episode of Arrested Development.
Added:
A picture of George Bluth Sr, the patriarch of the Bluth family and the founder of Bluth company.
Added:

Arrested Development Quotes

I am having a love affair with this ice cream sandwich.

George Sr.

The zero hour, Michael. It's the end of the line. I'm the firstborn. Sick of playing second fiddle. Always third in line for everything. Tired of finishing fourth. Being the fifth wheel. There are six things I'm mad about, and I'm taking over.

Gob