Warner Bros Studio Tour London: The Making of Harry Potter, open to the public beginning March 31, 2012, released a tiny preview of the cast that will be participating in Thursday's fansite and Twitter chat, including - from left to right - Mark Williams, James Phelps, Oliver Phelps, Warwick Davis, Bonnie Wright, Natalia Tena, and Tom Felton. Do note that although Julie Walters was listed in the original cast to take part, she does not appear in the preview below.

Remember to stick with SnitchSeeker for the fansite chat, which we will have embedded live in a new post at exactly 3pm BST; and follow the tag #wbstudiotour for the Twitter chat to take place at 2pm BST. Remember to send your questions for SnitchSeeker right here on our official Facebook.

Bonnie Wright: Join us on Thursday the 13th of October at 3 p.m. UK time …
Oliver Phelps: … for an exclusive video webchat to celebrate …
Mark Williams: … Warner Bros Studio Tour London …
Nat Tena: … The Making of Harry Potter …
Tom Felton: @WB_Studio Tour on Twitter …
Warwick Davis: … to submit questions or for further information.
James Phelps: We look forward to speaking to you then.

The embed for Thursday's fansite chat, at 3pm BST, can be seen here.