Nick Offerman has a twitter account. Though it's not verified yet, multiple castmates have confirmed that it's the real deal. Plus, Serena Williams has a pimple on her forehead, Fred Willard does “Who's On First,” and plenty of jokes about it being International Women's Day (duh).
Source: @Nick_Offerman
Source: @Nick_Offerman
Source: @Nick_Offerman
Source: @louisck