Let's make this birthday one to remember.

45 years old (Born on August 03, 1979)

Canadian actress; She is famous from Kate on Lost.

In 2003, she was cast in several commercials for a dating hot-line called "LiveLinks". The late-night ads ran for over two years on basic cable channels, even after she made it big on ABC's hit drama "Lost" (2004). During a guest spot on "Late Show with David Letterman" (1993), David Letterman embarrassed the actress by playing one of her commercials on the show. Before starring on "Lost" (2004), she worked a variety of other jobs. She has worked as a flight attendant, waitress, and completed oil changes on big rigs while doing commercials and modeling to earn money for University. Voted one of the Breakout Stars of 2004 by Entertainment Weekly Magazine Prior to her starring role on "Lost" (2004), she worked as an extra on film sets to help pay her University tuition. She can be seen in episodes of "Tru Calling" (2003), "Dead Like Me" (2003) and "Smallville" (2001), and in several films including White Chicks (2004), Stealing Sinatra (2003) and Freddy vs. Jason (2003). Presented The Tragically Hip at Live 8 Canada.

Her father is a Home Economics teacher in Canada. Her mother worked as a cosmetician and ran a daycare center.

Has two sisters - younger sister is named Andrea.

Refused to do a partial nude scene in an early episode of "Lost" (2004).

Ranked as #75 in FHM's "100 Sexiest Women in the World 2005" special supplement. (2005)

Kate, her character on "Lost" (2004), is frequently seen climbing trees. This is because the very athletic Lilly loves to climb trees herself.

First discovered by agent Jeff Palffy, formerly Ford Models, now with PMG Management in Vancouver, who was instrumental in her first break on Lost.

Her house in Hawaii was destroyed by a fire. Luckily, no one was hurt. [December 2006]

Named #2 on the Maxim magazine Hot 100 of 2005 list.

Attended the University of British Columbia where she attained a degree in international relations.

Fluent in French and loves ice skating, canoeing, kayaking, snowboarding and rock climbing.

Named #73 in FHM magazine's "100 Sexiest Women in the World 2006" supplement. (2006).

Ranked #68 on the Maxim magazine Hot 100 of 2007 list.

Founded and ran a world development and human rights committee at her university. She has lived under a grass hut in the jungles of the Philippines with a missionary group, and has been a volunteer for children's projects since the age of 14.