Elizabeth Mitchell is joining Lost as a potential new love interest for Jack (played by Matthew Fox). Mitchell was Kerry Weaver’s girlfriend on ER, and interestingly enough, the lesbian lover to Angelina Jolie’s Gia. Mitchell will play Juliet, who has the potential to upset the previous Jack-Kate-Sawyer love triangle that was established in the first two seasons of the series. According to Carlton Cuse, Lost executive producer, “I wouldn’t call [Season 3] the season of sex, but I will say that romance will play a much more active part of the show this year.” It’s unclear as to whether Mitchell’s character will be on the island, part of a flashback, or in the parallel “real world” that the show is starting to reveal. And still, there is one more casting announcement yet to be made, as Cuse previously said that three new people would be joining the cast (we previously mentioned the casting of Rodrigo Santoro).