Princess Charlotte waves to Meghan Markle and Britain's Prince Harry on the steps of St George's Chapel at Windsor Castle following their wedding in Windsor, near London. Photo / AP
Kate arrived to Windsor Castle hand-in-hand with Meghan's adorable flower girls and page boys as the bride-to-be stepped out of her vintage Rolls-Royce.
The six little girls, including Princess Charlotte, were dressed in all white and had flowers adorning their hair as they followed behind Meghan Markle as she walked down the aisle.
The four page boys, including Prince George, also trailed the bride as two held her metres-long wedding veil as she walked towards Prince Harry, the Daily Mail reports.
Just before the bride arrived, the bridesmaids and pageboys were ushered in by the Duchess of Cambridge, who helped coax them into their positions with an encouraging hand on their shoulder.
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.
When Meghan appeared through the doors of the chapel, sunlight streaming in behind her, she turned to smile and wave at the children who were standing to her right behind the door.
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.
Ms Markle's wedding dress has been designed by the acclaimed British designer, Clare Keller, the first female Artistic Director at the historic French fashion house Givenchy.
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.
Celebrity royalty including the Clooneys, the Beckhams, Idris Elba, Elton John and Oprah Winfrey are among some of the world's biggest stars watching them marry.
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.