The British actor joined the cast when he was offered the role of bloodsucker Demetri in the second film, The Twilight Saga: New Moon.
The 29 year old admits he did plenty of research before he tried out in front of movie bosses - and even reached out to devotees online to garner their expertise.
He tells Britain's OK! magazine, "I remember when I got the audition and I went on (social networking website) Facebook and said, 'Tell me what you know about his guy Demetri.' Before I knew it I had this network of female minions from around the Facebook galaxy feeding me all this information."