Professor Stephen Hawking's memorial service may see a few time-travelling guests who are yet to be born - if you believe such a thing could be possible.
In a fitting homage to Stephen Hawking, the theoretical physicist's memorial service will not only be open to members of the public, but time travellers of the future, too.
Hawking's foundation said that the possibility of time travel has not yet been disproven, so it can not be excluded.
Despite his little party trick not working when he was alive, he wasn't completely sold on the idea that time travel was impossible.
The thanksgiving service for the late British physicist Stephen Hawking, to be held at Westminster Abbey, in London, on June 15th, is open to "time travelers" but not to flat-earthers, and this is not a joke.
The world's most recognisable scientist died in March aged 76 after a lifetime spent probing the origins of the universe.
When those going onto the online memorial service ballot click on the date of birth section, a pop-up box allows people to put in dates from 2019 to 2038. Talking to the press at the Seattle Science Festival in 2012, Hawking said: "I gave a party for time-travellers but I didn't send out the invitations until after the party. Look out for time travelers at the Abbey".
Sarah Bridle, a professor of Astrophysics at the University of Manchester, told BBC Radio that Hawking had remained curious about the potential for time travel, even after his party in 2009.
"Rapid space-travel, or travel back in time, can't be ruled out, according to our present understanding", Hawking said during a 1999 lecture entitled "Space and Time Warps", cautioning however against the "great logical problems" such a feat might engender".
However, some claim that the this is not a time travel experiment rather a programming error that the website is accepting registration from people born two decades from now.
In January a year ago, Prof Hawking posted a touching tribute to his family, friends and others who have "helped and supported me along the way and made my universe so full of life, love and energy". Arguably the most famous scientist in recent times, Hawkings was well known for his research on black holes which further helped scientists all around the globe to unravel secrets of the universe. The ceremony at Westminster Abbey will take place on June 15, for which Hawking's children are offering 1,000 free tickets to the public.