Ian McKellen's height is 5ft 10.5in (179 cm)
Peak height was 5ft 11in (180 cm)
British actor best known for his portrayal of Gandalf in The Lord of the Rings movies and Magneto in The X-Men. When asked about his height, he once said: "It depends on whether I'm standing up straight. Probably about six feet".. Granted I think he might have shrunk 1cm since his heyday of about 5ft 11.5, he does hold good posture in photos and on film and knows many a trick when posing - in fact, he has his own technique: "The McKellen Technique"
He's also wise to the tricks of camera's, when asked about his height in regards to X-Men: "Tyler Mane is nearly a foot taller than I am but there was no intention to trick you into thinking otherwise. The camera can, however, give the impression that an actor close to the lens is larger than one who is more distant"