ORLANDO, Fla. -

Universal Orlando begins a major Harry Potter-themed weekend on Thursday with a webcast surrounding the expansion of the Wizarding World of Harry Potter.

The theme park will host the webcast for registered guests at 10:30 a.m. Universal is promising "all-new details about the shops and attractions." The park is also expected to give viewers a sneak peek inside Diagon Alley, which is currently under construction.

Thursday's webcast comes one day before the start of "A Celebration of Harry Potter," a three-day event at Universal Orlando.

The festival starts Friday night with a "wand master class." Guests will get wand combat training from choreographer Paul Harris and "a special guest."

The weekend also includes the Harry Potter Expo, which will have interactive activities like "The Sorting Hat Experience" and a vignette of movie costumes.

Fans can also participate in Q&A sessions with cast members from the Harry Potter films and panel discussions with graphics designers from the movie.

Cast members expected to attend include:

  • Evanna Lynch (Luna Lovegood)
  • James Phelps (Fred Weasley)
  • Oliver Phelps (George Weasley)
  • Matthew Lewis (Neville Longbottom)
  • Mark Williams (Arthur Weasley)

The Wizard World of Harry Potter: Diagon Alley is expected to open in the summer of 2014. It will include a ride based on Gringotts Wizarding Bank, the Hogwarts Express train and new shops.

Stay with Local 6 and ClickOrlando.com to learn what new details are unveiled during the webcast.