Contrary to recent rumors and according to a verified source on set, Michael Berendt, who
we told you last week will be playing Tom Riddle at age 18 in
Harry Potter and the Half-Blood Prince, will not be replacing actor Frank Dillane, who was cast as Tom Riddle at age 16.
So what will Berendt be doing in the film as 18-year old Tom Riddle? His role merely consists of a pair of hands stealing the Hufflepuff cup – that's it. The actor has no dialogue and no face time on screen.