With filming currently taking place of Harry Potter and the Half-Blood Prince in Lacock, UK, some pictures featuring Daniel Radcliffe and Michael Gambon have appeared online.
According to the article:
Radcliffe, 18, and Michael Gambon (Albus Dumbledore) were spotted sharing a laugh during a film break. Check out Gambon’s hilarious beard protector! The pair filmed the scene at Slughorn’s home in "Budleigh Babberton," where Harry and Dumbledore persuade the former Potionsmaster to return to Hogwarts to teach.
Half-Blood Prince is being directed by David Yates and will be released November 21, 2008. Thanks to Joseph for the link.