Alexandra "Alex" Rousseau is a recurring fictional character on the ABC television series Lost played by Tania Raymonde. She was born in 1988 , 16 years prior to the crash of Oceanic Flight 815, but was taken from her mother by The Others. She was raised among them, believing her mother to be dead. She has helped the survivors of Oceanic Flight 815 on many occasions, and was reunited with her mother at the end of Season 3.