Harry Potter fans from across the country are expected to descend on Universal Orlando this weekend for "A Celebration of Harry Potter," the theme park's annual festival honoring the popular movie and book franchise.

Actors Rupert Grint, Matthew Lewis and Evanna Lynch are expected to appear for a question-and-answer session during the three-day event.

Grint played Ron Weasley, Lewis played Neville Longbottom and Lynch portrayed Luna Lovegood in the movie series. Other actors expected at the actor Q&A session include Bonnie Wright (Ginny Weasley) and Katie Leung (Cho Chang).

Other activities include an expo where guests can learn more about Pottermore and the U.S. publisher of the Harry Potter series, Scholastic. Attendees can also experience the world of Harry Potter firsthand through "Harry Potter: The Exhibition", learn more about graphic props created for the films by MinaLima, and enjoy Warner Bros. Studio Tour London.

Fans attending also get an inside look at movie prop-making in a Q&A session with Pierre Bohanna, the head prop-maker for the film series; pose for Quidditch-themed photos; test their Potter trivia knowledge and take a wand class.

"A Celebration of Harry Potter" takes place in the Wizarding World of Harry Potter areas in the resort. It starts today and wraps up Sunday.

For more information about the event, go to universalorlando.com/celebration.