One of the most endearing stories about the late Stephen Hawking was when he put out an invite to time travellers to attend a party of his - but no one came. The physics professor said he put out the invitations after the event, with the thinking that if time travel was possible, people would leap back a few years to go to the party.
Well, it appears that his family is keeping the joke going for his upcoming memorial service at Westminster Abbey on 15 June.
According to London blogger ianvisits, to apply for a ticket, you have to fill out a form and, in the section, where you put your date of birth, the section allows for people born up until the year 2038.
The blogger wrote: "Professor Hawking once threw a party for time travellers, to see if any would turn up if he posted the invite after the party.
"None did, but it seems perfect that the memorial website allows people born in the future to attend the service. Look out for time travellers at the Abbey."
Despite his little party trick not working when he was alive, he wasn't completely sold on the idea that time travel was impossible.
He said that Einstein's theory of relativity suggests time travel is technically doable - but it's equally likely that trying to achieve it wouldn't end well for us.
In a Q&A, written up by Arts Technica, Professor Hawking said: "Einstein's general theory of relativity seems to offer the possibility that we could warp space-time so much that we could travel back in time.
"However, it is likely that warping would trigger a bolt of radiation that would destroy the spaceship and maybe the space-time itself."
The renowned theoretical physicist, cosmologist and author died aged 76, on 14 March and his funeral took place at Great St Mary's Church, Cambridge.
Amongst the mourners was a host of celebrities, including Eddie Redmayne and Felicity Jones who both starred in the Theory of Everything - a movie about Hawking's amazing life.
Model Lilly Cole, newsreader Charlotte Hawkins and Queen guitarist Brian May were also in attendance. As was comedian Dara O Briain, who made a documentary about Hawking in 2015.
Following the service, his ashes were placed near the grave of Sir Isaac Newton at Westminster Abbey.
Professor Hawking was diagnosed with motor neurone disease in his 20s, when he was told that he had only a few years left to live. However, he went on to defy doctors - living until 76 - and carving out an unbelievable career for himself due to his incredible genius and his ability to make people laugh, which saw him crossing over into popular culture.
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