1956: The year it all began

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Across
  1. 4. Actress who married Prince Rainier of Monaco in 1956. (5)
  2. 5. Melbourne hosted these in 1956. (8)
  3. 6. The English waterway first swum by a woman in 1956. (7)
  4. 8. The first commercial ______ video recorder was demonstrated in 1956. (4)
  5. 9. American actor who starred in The King and I in 1956. (5)
  6. 11. King of Rock and Roll whose popularity exploded in 1956. (5)
  7. 13. International crisis over an important canal. (4)
  8. 15. Music genre that dominated the charts in 1956. (4,3,4)
Down
  1. 1. She celebrated her 30th birthday in 1956 and remains Britain's monarch in many people's memories. (5)
  2. 2. First name of the woman who swam the English Channel both ways in 1956. (6)
  3. 3. Hungarian city at the centre of the 1956 uprising. (8)
  4. 7. Song contest first held in 1956. (10)
  5. 10. Egyptian president during the Suez Crisis. (5)
  6. 12. Famous British car launched in 1956 – the Minor ______. (6)
  7. 14. Colourful modelling compound first sold in 1956. (7)