Despite no director having been announced for Half-Blood Prince (although David Yates is considered likely to return), casting is
apparently in progress for the film that's due to start shooting later this summer.
Specfically Icelandic actor
Jón Páll Eyjólfsson (another photo can be seen
here) is believed to have auditioned for the role of Young Voldemort (although the actor himself would not say which part he was being seen for).
Quote:
“Everything is in a very sensitive stage but it is certainly exciting and it would be great if I get the role,” Eyjólfsson told Fréttabladid.
Quote:
“I have met the people who are behind this film and I have read from the script. At this stage you only get to see parts of the script and there is a lot of secrecy about this whole thing,” Eyjólfsson said.
He has apparently had call-backs and will get a final decision in May as to whether he's cast or not.
Eyjólfsson graduated from a London stage school in 2000 and was at school with Steven Kloves (who has written films 1-4 and 6), who suggested he go for the role.
Source:
The Leaky Cauldron 
Casting report for Half-Blood Prince 
