Young love blossoms at Hogwarts: Ginny Weasley gets engaged to Gellert Grindelwald - at the tender age of 19



It's a match made in Hogwarts – after Cupid cast his spell on the set of the new Harry Potter movie.



In fact, so infatuated has Bonnie Wright become with her co-star Jamie Campbell Bower, who plays Gellert Grindelwald, that they have become engaged – although she is just 19.



Bonnie, who plays flame-haired Ginny Weasley, has been dating 21-year-old Jamie for less than six months and their announcement that they plan to marry stunned fellow cast members working on the final instalment of the saga, Harry Potter And The Deathly Hallows.



Mr Wright? Jamie Campbell Bower and Bonnie Wright on a night out in London

A source said: ‘We are all absolutely shocked and surprised and can’t believe that Jamie has asked Bonnie to marry him.’



Bonnie, whose character is the sister of Ron Weasley in the Potter films, is Harry’s love interest on the screen – but she has been swept off her feet by Jamie in real life.



Bonnie's sparkling diamond engagement ring

The source added: ‘They met on the set of the movie and Jamie fell for Bonnie really badly.



'He says they are completely in love. It all seems very whirlwind, but they both say it’s the real deal.’



Jamie is understood to have proposed to Bonnie last month.



The source said: ‘All he has told us is that he asked her to marry him and Bonnie said yes.



'He is chuffed to bits and neither of them seem to have any doubts that they are rushing in too soon. We have asked them if it is for real and they have said yes.



‘They are both very professional, so when they are filming, there is no smooching or playing around.



'Also they are not really in the same scenes. Jamie is often on the set just to watch

Bonnie and spend time with her between takes.’

There were rumours in October that the pair were romantically linked when they were photographed attending a red- carpet premiere, but both declined to comment.



It was only when they attended the Bafta Awards in February hand-in-hand that they publicly confirmed their relationship.



Magical cast: Bonnie, third from right, with stars of the Harry Potter films

Shortly after the ceremony Bonnie said that they were an item. ‘Yes, we’re dating,’ she told a magazine. ‘We’ve been seeing each other for a few months, it’s good.’

The young actors are understood to have told their families that they plan to marry, although they have yet to set a date.

London-born Bonnie, who is studying for a degree in film at the London University of the Arts, is said to bear an uncanny resemblance to Jamie’s ex-girlfriend Zoe Graham, a budding clothes designer who also has striking red hair and pale skin.

Friends say they were so close that Jamie had Zoe’s name tattooed on

his chest.



All grown up: Actress Bonnie in a fashion shoot

The source said: ‘They split up last year and within months Jamie was dating Bonnie. He really wears his heart on his sleeve, and when he was dating Zoe he had her name tattooed above his heart.

‘Zoe feels rather cast aside. It was a very serious relationship and he was always very proud of the tattoo. No one’s sure what he’s going to do about that now he’s with Bonnie.’

Jamie is considered to be one of the UK’s most promising actors.



He appeared in the cult movie Twilight – New Moon, about young vampires, and in Sweeney Todd: The Demon Barber of Fleet Street with Johnny Depp and Helena Bonham Carter.



The film adaptation of Deathly Hallows, the final book in J. K. Rowling’s epic saga, will be released in two parts, one in November and the next in July 2011.