Microsoft announced availability for Expression Studio to all MSDN Premium subscribers with the release of Expression 3 on MSDN Subscriber Downloads. It includes version 1 and 2 as well.
Previously, only subscribers at the Visual Studio Team System Team Suite with MSDN Premium level have been able to download Expression Studio, while all other MSDN Premium subscribers (e.g., Visual Studio Professional with MSDN Premium, Visual Studio Team System Development Edition with MSDN Premium, etc.) only had access to Expression Web and Expression Blend.
Courtesy: MSDN Blog