She entered the chapel at Windsor Castle to marry financier Thomas Kingston after stepping from a claret-coloured vintage vehicle, accompanied by her father, Prince Michael of Kent.
Queen Elizabeth was spotted in a hot pink outfit alongside her husband Prince Philip.
Among the guests - who arrived in vintage buses near St George's Chapel - was the creator of Downton Abbey, Julian Fellowes, and Pippa Middleton, who is the sister of the Duchess of Cambridge and also a friend of the groom.
Central US cleans up after severe weather
The severe weather data gathered Friday evening confirmed tornadoes tearing through areas of Texas, Oklahoma, Nebraska and Kansas. Violent tornadoes, very large hail and destructive winds are all possible from northern Texas to southern Kansas on Monday.
Federer withdraws from Italian Open - English
Djokovic, who beat unseeded Argentine Diego Schwartzman 6-3, 6-7 (2-7), 6-3 in his semifinal, is the top-rated player in tennis. Osaka said she could stay in Rome before going on to the French Open , but did not rule out competing in Roland Garros.