Excerpted from an interview with Marsha Thomason, in Digital Spy, published Friday, May 18 2007, 16:20 BST:

How familiar were you with Lost before you joined the show?
“I loved Lost! I’ve known Dominic Monaghan for years and so I watched the show because he was on it, and I became a huge fan immediately, so I was really excited when I got the part.”

[...]

Is there much camaraderie on set between the brits?
“Yeah, but I mean I already had a friendship with Dom, and Henry Ian Cusick is just great. We had a lot of fun together and we had my first scenes together.”

http://www.digitalspy.co.uk/cult/a46737/losts-marsha-thomason-interview.html