In the fickle world of showbiz and celebrity, you don't always know what to believe or who to trust.

So when actor David Harbour - aka Hopper from 'Stranger Things' - says he'll do something for a random Twitter user if they get a certain number of retweets, you can take it with a pinch of salt.

However, it seems that Harbour is a man of his word, as he's now followed through on two promises made to fans on the social media platform.

The first was appearing in a young fan's yearbook photo earlier this year:


The most recent one was

officiating at a fan's wedding

- in full Chief Hopper costume, no less - which took place at the weekend in Illinois:

Earlier this year, he also got Greenpeace to bring him on an expedition to the Antarctic to see some penguins...

He truly is worthy of Bill Murray's crown of soundness.