Warner Home Video has announced the launch of the online “Harry Potter and the Goblet of Fire Giveaway” contest, timed to today’s DVD release. If you win the contest, you and three friends will take a trip to the UK for a behind-the-scenes tour of the Harry Potter and the Order of the Phoenix movie set and a chance to meet members of the cast.

Other prizes in the contest — more than 250 of them — include Harry Potter PS2 video games, movie collectibles, movie soundtracks, portable digital media players and more. You can also collect trading cards, send e-cards, vote for your friends for “Champion” (which gets you more chances to win), and — this is a marketing stunt, ya know — preview and order the Goblet of Fire DVD.

To register, go online at:

http://warnerbros.eprize.net/harrypotter4/index.tbapp?page=coppa_age_form&email=&session_id=pbfew4tel2hqj0b9

You enter your birthday, then it will take a little while as the preveiw for the movie loads. But you can skip it, if you want. Then you get to the registration screen. It will require you to enter your mobile phone number. After registering, your registration form will be whisked into the virtual Goblet of Fire and you’ll receive a text message. I don’t know what it is because I don’t want to pay the money to view it (OK, I’m cheap.)

The other option for registering is text messaging “GOBLET” to 65579 on your mobile phone. I can’t tell you what happens next.

Once entered, you can see if you have instantly won one of the prizes. Every Friday, a select number of participants will instantly win the Harry Potter and the Goblet of Fire soundtrack and a portable digital media player.

The promotion is open to people aged 6 and older in the United States and Canada, except Quebec. Mobile entry is restricted to those over 13 years of age. Harry Potter and the Order of the Phoenix opens next year.