Wood was, arguably, at the peak of her powers: 1961 also saw the release of hit musical West Side Story - with Wood in the leading female role of Maria.

BBC: Natalie Wood: A Hollywood enigma

So when Jimmy Page, Robert Plant, John Paul Jones and John Bonham burst onto the musical scene in the late 1960s, the world never saw it coming.

WHITEHOUSE: President Obama Speaks at the 2012 Kennedy Center Honors Reception | The White House

Wood built on her stardom with the 1962 musical Gypsy, and 1963's Love with the Proper Stranger, which saw her win her third Oscar nomination as a shop assistant facing unwanted pregnancy.

BBC: Natalie Wood: A Hollywood enigma

The first Sundance London saw screenings of new work by American film-makers, live musical performances and one royal appearance when Prince Charles attended and introduced the premiere of a documentary outlining his views on the environment.

BBC: Sundance London to return in 2013 and 2014

The show plays like an old-fashioned backstage musical: we see the camaraderie and the competition among the women, the old saw of an older woman feeling threatened by a younger one, and the kinds of bits that are thrown in to show, in cheeky shorthand, how times are changing.

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