This just in: Kirsten Prout has joined the cast of Eclipse!

E! Online has reported that the Kyle XY star has been cast as the vampire Lucy in the upcoming sequel to Twilight. Lucy is a prominent part of Jasper's backstory and builds a bloodsucking army with Catalina Sandino Moreno's Maria.

The David Slade-directed film stars Kristen Stewart, Robert Pattinson, Taylor Lautner, Ashley Greene, Peter Facinelli, Elizabeth Reaser, Kellan Lutz, Nikki Reed, Jackson Rathbone, Billy Burke, Bryce Dallas Howard, Xavier Samuel, Jack Huston, Julia Jones, BooBoo Stewart and Jodelle Ferland.

Eclipse is expected to hit theaters on June 30, 2010.