Eliza Spencer, Louis Spencer, and Kitty Spencer - three of the four children Earl Spencer had with his first wife, former fashion model Victoria Aitken - were also present as they walked arm-in-arm with their mother today.
Meanwhile the whole of Kate Middleton's family arrived together this morning, including the Duchess of Cambridge's parents Carole and Michael, brother James, and sister Pippa with her husband James Matthews.
A smiling Meghan Markle (main picture and inset) has started her final journey to marry Prince Harry giving the world the first glimpse of the bride's dress.
The 36-year-old looked a vision in white and is wearing a diamond-encrusted tiara and veil over her face as she left Cliveden House Hotel in Berkshire for Windsor Castle.
Filmstar Idris Elba, US TV host Oprah Winfrey and singer James Blunt were among the first celebrities to arrive at St George's Chapel this morning.
After the grand arrival of the Beckhams and the Clooneys (pictured, top), filmstars Tom Hardy (bottom left) and Carrie Mulligan (bottom right) and TV host James Corden were seen filing into the church.
Her mother Doria smiled and looked adoringly at her daughter in the back of her wedding car, again supporting her in the absence of her father Thomas Markle.
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 (right).
George's Chapel this morning - a far cry from her tears over the 2011 royal wedding snub.
Dressed in a navy skirt suit, Jess Collet hat and towering heels, Sarah arrived separately from her daughters and ex-husband.