The Rt. Hon. Christopher Haden-Guest, 5th Baron Haden-Guest (born February 5, 1948), better known as Christopher Guest, is an American screenwriter, composer, musician, director, actor and comedian. He is most widely known in Hollywood for having written, directed and starred in several improvisational "mockumentary" films that feature a repertory-like ensemble cast, such as This is Spinal Tap. In the United Kingdom, he holds a Baronial peerage, and has publicly expressed a desire to see the House of Lords reformed as a democratically-elected chamber. Despite initial activity in the Lords, his career there was cut short by the House of Lords Act 1999. When using his title, he is normally styled for short as Lord Haden-Guest.

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克里斯托弗·哈登-盖斯特（Christopher Haden-Guest），第五代哈登-盖斯特男爵（生于1948年2月5日），更广为人知的名字是克里斯托弗·盖斯特（Christopher Guest），是美国编剧、作曲家、音乐家、导演、演员和喜剧演员。他在好莱坞最广为人知的是编剧、导演和主演了几部即兴的“模拟”电影，这些电影具有类似剧目般的合奏演员阵容，例如《这是脊椎穿刺》。在英国，他拥有男爵贵族身份，并公开表示希望看到上议院改革为民主选举产生的议院。尽管最初在上议院活动，但他的职业生涯因 1999 年上议院法案而缩短。当使用他的头衔时，他通常简称为哈登-盖斯特勋爵。