That was over 15 years ago in 2006.
Today she is 35, and has starred in 20 movies in total, 8 since Poseidon was released.
In Poseidon, I think Emmy Rossum looks:
Poseidon scores 5.5 out of 10 on The Movie Database.
Emmy Rossum's first acting role was as 'Claire Addison' in Genius, released in 1999 when she was 12.