(Cover) - EN Showbiz - Robert Pattinson is considering proposing to Kristen Stewart, sources have claimed.

The pair met on the set of the first film in the vampire franchise, where he plays moody vampire Edward Cullen and she portrays Bella Swan, a young girl who falls in love with Edward.

The 24-year-old British actor is always coy about his relationship with his co-star Kristen, and she is equally reluctant to discuss their romance.

Now sources have revealed Robert is in fact keen to prove his commitment to the 20-year-old actress, and is considering marriage.

Rob and Kristen have been secretly dating for three years now, which is a long time. Theyre each others first loves and they cant imagine life without each other. Hes hinted to his friends that this could be a turning point in his life. He wants to make a commitment, a source told more! magazine.

It has been reported Robert is so loved-up that hes invited Kristen to spend Christmas day at his family home in England. Apparently the hunky actor wants his US co-star to experience what the holidays are like in his home country, including watching traditional English television shows which air on December 25.

She absolutely loves being in Britain with Rob and really gets on with his family, especially Robs sisters. Robs mum is planning to pull out all the stops, which will include watching EastEnders and the Queens speech! added the insider. (C) Cover Media