Paul McDonald has got engaged to 'Twilight' star Nikki Reed after just three months of dating.

The 'American Idol' hopeful - who has been embroiled in a whirlwind romance with the 23-year-old star since March - and his new fiancee showed off her sparkling diamond ring at last night's (05.06.11) MTV Music Awards.

Nikki confirmed to E! News: "He's the one."

The actress - who plays Rosalie Hale in the 'Twilight' franchise - also admitted Paul had been writing songs that were inspired by the couple's relationship.

She added: "He says he's going to release a Nikki Reed EP."

Meanwhile, Nikki recently hit back at those who have suggested their romance has progressed too quickly, saying she has never met a man with such a "good solid heart".

She said: "I love him and I don't care. I've never met anyone like him. I've never met anyone who has such a good solid heart and comes from such a good solid family and is just a genuine person. We have the exact same sense of humour. I've never laughed so much with anyone as I do with him."