Ryan Reynolds has written an emotional tribute to Connor McGrath, a 13-year-old Deadpool fan who died this week in Edmonton, Canada, after a three-year battle with cancer.

Reynolds met McGrath through the Make-A-Wish Foundation, when Reynolds traveled to Edmonton to surprise the boy with a rough cut of Deadpool.

“Because of his wish, Connor was the first person to see Deadpool,” Reynolds writes. “I traveled up to Edmonton, Alberta to surprise him with a rough cut of the film. There were still huge sections with wires we hadn’t yet painted out, jokes which weren’t working (and still aren’t) and green screens. Connor didn’t seem to mind. And I’d never felt luckier to get to be Wade Wilson.”

Read Reynolds’ full tribute below.