The 12-year-old Stranger Things actress, who has made the character Eleven famous, and the 27-year-old Harry Potter actor, who plays Neville Longbottom in the films, were super excited to meet each other.
In the photo, which Matthew posted on his Instagram on Sunday (October 16), both of them make shocked faces while Millie points to Matthew ‘s “11″ tattoo written in Roman numerals.
“A lot of people ask what my tattoo means,” Matthew captioned the pic. “Now you know. @milliebobby_brown #XI #Eleven.”
Matthew has actually had his tattoo for a few years now – but you never know if a Time Turner or other Stranger Things were involved!