The names Kristen Stewart and Robert Pattinson probably don't mean much to British film fans right now.
But that's all set to change with what has been tipped to be the one of the biggest blockbusters of 2008, the vampire romance movie Twilight.
American actress Kristen, 18, and London native Robert, 22, were greeted by hundreds of screaming fans at the British premiere of the big-screen adaptation of best-selling teen novels.
Hollywood newcomers: Keeping in theme with the movie, Twilight's stars Kristen Stewart and Robert Pattinson opt for the dark lookIn keeping with the film's Gothic theme, leading man Robert went for a smart black suit, while his co-star Kristen braved the chills in a thigh-skimming mini-dress and killer heels.
Robert has been tipped as the next Orlando Bloom thanks to his dashing good looks and brooding charm.
Hero's welcome: The actor greets hundreds of fawning teens as he signs autographsThe majority of the screaming fans crowded outside the Vue cinema in Leicester Square were female and appeared to be there to catch a glimpse of their new pin-up.
Female devotees carrying signs had been waiting in the square since early Wednesday morning.
Brooding: Robert is tipped to be the next Orlando Bloom
Big fan base: A crowd of screaming teenage girls waited for hours to see RobertRobert may look familiar to Harry Potter fans as Cedric Diggory, the prefect of Hufflepuff House, whose life is saved by the boy wizard in Harry Potter And The Goblet Of Fire.
Kristen is now unrecognisable from her previous biggest Hollywood role - playing the teenage tomboy daughter of Jodie Foster in the 2002 film Panic Room.
The film, adapted from Stephanie Meyer's 2005 paranormal novel, tells the story of the romance between a human teenage girl Bella Swan (Kristen) and 108-year-old vampire Edward Cullen (Robert).
Meyer's Twilight books have sold over 25million copies worldwide and a further 20million copies in the U.S. and have been translated in 37 languages.
Teen sensation: The Twilight books have sold over 25million copies worldwide
Where's Wossy? Jonathan Ross's wife Jane Goldman arrived aloneWhen the movie was released in the U.S. on November 21st, it took an amazing $69million on its opening weekend.
The film is tipped to be equally big in Britain and the rest of Europe when it is released later this month.
It is expected to transform relative unknowns Kristen and Robert into huge stars.
Twilight is released in British cinemas on December 19.
Teen romance: Kristen and Robert as Bella Swann and Edward Cullen in a scene from Twilight