Here's your first look at Meghan Markle's wedding dress!

Meghan Markle has arrived at the chapel, giving the world the first glimpse of the bride's dress ahead of arguably the most A-list wedding in history.

The 36-year-old looks a vision in a classic pure white silk gown and a diamond-encrusted tiara.

Meghan surprised everyone by wearing a wedding dress designed by Givenchy's Clare Waight Keller after months of speculation liking her to other designers, such as Ralph and Russo. 

The stunning gown featured three quarter length sleeves and a bateau neck and was accompanied by a beautiful veil representing the Commonwealth.

The veil is five meters long and made from silk tulle with a trim of hand-embroidered flowers in silk threads and organza.

A statement from Kensington Palace said: "Ms. Markle expressed the wish of having all 53 countries of the Commonwealth with her on her journey through the ceremony. Ms. Waight Keller designed a veil representing the distinctive flora of each Commonwealth country united in one spectacular floral composition."

Meghan also wore a diamond tiara, on loan from Harry's grandmother Queen Elizabeth.

Kensington Palace added: "The veil is held in place by Queen Mary's diamond bandeau tiara, lent to Ms. Markle by The Queen. The diamond bandeau is English and was made in 1932, with the entre brooch dating from 1893."

She opted for earrings and a bracelet made by Cartier along with Givenchy shoes.

Meghan and her mother Doria arrived in a Rolls-Royce Phantom IV, which was built and delivered to the Queen in 1950 and used by Kate Middleton for her trip to Westminster Abbey when she married William seven years ago.

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. 

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.