By Tanner Stransky
Updated July 17, 2009 at 05:15 PM EDT

The first big casting for the third installment of Twilight, titled Eclipse, is unknown Australian actor Xavier Samuel, who has been taped for the role of “newborn vampire” Riley, described as a “good-looking college student who joins the plot of villain Victoria to murder protagonist Bella (Kristen Stewart).” The news was first reported byThe Hollywood Reporter, which says, “Riley is corrupted by Victoria, for whom he has an inexplicable weakness.” Samuel, although virtually unknown in the States, has appeared in several Australian movies, but this is his first U.S. role. Eclipse is set to begin shooting next month in Vancouver and is scheduled to be released on June 20, 2010.