The children were handed flowers behind the door when one of the little bridesmaids began to cry.
The Cambridges' nanny, Maria, lifted her up to comfort her, as Prince George looked up at the tearful girl.
A member of Prince Harry's household bent down to help to adjust one of the bridesmaid's dresses.
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Ms Markle arrived to marry Prince Harry in a simple but beautiful pure white dress and extraordinary long trail leaving the groom close to tears.
Harry grabbed his bride's hand and told her: 'You look amazing' and said 'thank you, pa' after his father Prince Charles walked her down the aisle of St George's Chapel, Windsor.
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The veil was held in place by Queen Mary's diamond bandeau tiara, lent to her by The Queen, made in 1932 - an outfit that left her mother Doria Ragland, 62, in tears.
Prince Harry looked nervous as he arrived at St George's with his best man William but quickly warmed up waving and grinning at crowds before greeting guests inside and outside the chapel.
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Outside St George's Chapel up to 100,000 fevered well-wishers have gathered in glorious British sunshine to cheer the couple as they start their new married life.
It is expected to be the biggest royal wedding in Britain since Prince William married Kate in 2011 with more than 21million UK households set to watch and 23million expected to tune in from America.