Second Potter teaser unveiled

Daniel Radcliffe plays Harry Potter

Makers of the upcoming Harry Potter movie have given fans a sneak online preview of the second eagerly-awaited trailer.

Warners Bros released the trailer to internet provider AOL on Tuesday to show two days before it goes on general view in cinemas.

The two-and-a-half-minute trailer gives a tantalising teaser to Harry Potter and the Philosopher's Stone, adapted from the first best-selling novel by JK Rowling.

The film, due out on 16 November, stars Dame Maggie Smith, John Hurt, Robbie Coltrane and newcomer Daniel Radcliffe as the teen wizard Harry.

Harry Potter stars Grint (top), Radcliffe and Watson

The trailer introduces viewers to the world of Harry Potter as he embarks on his new life as a wizard at Hogwarts school of magic.

Coltrane plays Hogwarts's groundsman and teacher Hagrid. The trailer begins as he opens Harry's eyes to what he really is.

"Have you ever made anything happen, things you cannot explain? You're a wizard, Harry!," he exclaims.

The mood is eerie. Owls fly across the screen as the trailer transports you into the depths of Hogwarts - an enormous castle with flame torches and spookily moving stairs.

The music speeds up and rises as Harry is seen going through his apprentice wizard paces, learning how to fly, handle a broom-stick - and casting spells.

He makes close friends with Ron and Hermione, played by Rupert Grint and Emma Watson. But not all is rosy at Hogwarts.

There are strict rules on where and when to play with magic from headmaster Albus Dumbledore, played by Richard Harris.

He also offers a dire warning for his pupils to stay out of the woods.

The first trailer was released on the Warners website in March before being seen in cinemas shortly after.