A new How I Met Your Mother theory about Lily has just been revealed to be true by its co-creator.
Backing this up is the fact that Lily didn’t want to take Marshall’s surname when they eventually got married.
Namely, the astronaut Buzz Aldrin.
Last week, it was highlighted that the sitcom continually pointed to the fact that Lily – the character played by Alyson Hannigan – had a very famous relative.