Other visitors consist of Pippa and Kate Middleton’s bro James Middleton together with sweetheart Donna Air.
Prince Harry is likewise reported to be taking his sweetheart Meghan Markle, regardless of the stringent ‘no ring no bring’ policy.
Fellow snowboarder Spencer is also a winter sports events organiser and jump designer, though his air guitar credentials remain a mystery.
Other guests include Pippa and Kate Middleton’s brother James Middleton along with girlfriend Donna Air.
Ben Fogle also attended Prince Williams and Kate Middleton’s wedding in 2011.
The year before he appeared in a documentary with Prince William and Harry to promote wildlife conservation charity Tusk, of which William is royal patron.
Trying to enjoy the experience as much as I can, and trying to get to know everybody as well as I can. I had a housemate who never washed up, used to leave plates with forks stuck to it. People who talk about themselves constantly, 'me me me' syndrome.
My flatmate would have parties and wake up in the morning to random bodies in the house. Going into the house and meeting someone you feel uncomfortable with, someone who gives you the creeps.
James Matthews’ younger brother Spencer Matthews – who previously starred in Made In Chelsea – will be there for the big day, but like Prince Harry will be flying solo with girlfriend Vogue Williams not on the guestlist.