Celebrity guests included Poppy's sister Cara and Ginger Spice Geri Halliwell.
The bride Poppy, 28, looked radiant as she stepped into St Paul's Church in Kensington.
Her sister Cara, the 21-year-old supermodel was dressed in white, just like the bride.
Poppy recently returned from Coachella festival.
There, she celebrated her upcoming nuptials with a series of mini hen dos.