There was some extremely sad news over the weekend following the death of Dave Legeno, who you might remember for his role as Fenrir Greyback in the Harry Potter movies.

Dave was tragically discovered to have died while hiking in California's Death Valley and since the news broke, several of his Harry Potter co-stars including Tom Felton and Emma Watson have taken to Twitter with messages of remembrance.

There's not much info on what happened although reports suggest Dave's death may have been heart related. Either way, the news has shocked those that worked with him and Emma and Tom have been paying their respects on Twitter.

"I'm so sad to hear about #DaveLegeno. He was such a lovely man. I hope he is resting in peace," Emma said.

"Gutted to hear the sad news about Dave Legeno. He was a true Big, Friendly, Gentleman. Was a pleasure every time we met," Tom added, posting a picture of himself and Dave during filming of Half Blood Prince.

Our thoughts are with his friends and family at this time.