Bill Nighy Courtesy of Gareth Cattermole/Getty Images for BFI Share on Facebook Share on X Google Preferred Share to Flipboard Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Send an Email Print the Article Post a Comment Bill Nighy has joined an all-star audio production of the Harry Potter novels as Professor Slughorn, alongside 11 other voice castmembers on Wednesday added to J.K. Rowling's classic book series turned into immersive productions for Audible and Pottermore Publishing.