Twilight star Robert Pattinson commits himself to Kristen Stewart with a ring
Rob is serious about his vampire co-star
We're told that Twilight star Rob, 26, has given K-Stew, 22, a ring to show his commitment to the relationship.
A source tells Now: 'It's a really beautiful emerald promise ring.
'They've discussed marriage and how many babies they want, but they know they've got plenty of time for that.'
Read more about Robert Pattinson and Kristen Stewart in Now magazine dated 11 June 2012 - out now!