Fred Armisen is headed to Dimension X, the parallel-universe Portland where mousers scamper about like urban chickens. As reportedly just announced at WonderCon, the comedian and Portlandia star has joined the cast of the Teenage Mutant Ninja Turtles sequel Out of the Shadows. Armisen will be providing the voice of Krang, the alien villain from the distant Dimension X. Of the casting, producer Brad Fuller promised, "Anyone who loves Fred will love what he is doing." So we'll definitely get to see his gross little brain-arms play the drums, right?