The newest "mockumentary" from the inimitable Christopher Guest ("Best In Show," "This Is Spinal Tap") hilariously captures the reunion of 1960s folk musicians in New York, with a stellar ensemble cast whose hilarious improvisational comedy is as inspired as ever. Also starring Eugene Levy ("Bringing Down the House," the "American Pie" movies), Harry Shearer (TV's "The Simpsons," "This Is Spinal Tap"), Michael McKean ("Auto Focus," "Best in Show"), Parker Posey ("Superman Returns," "Best in Show"), Catherine O'Hara ("Home Alone," "Beetlejuice") and Fred Willard ("Anchorman: The Legend of Ron Burgundy," "Harold & Kumar Go to White Castle").