The phrase 'I'll have what she's having' is a famous line from the 1989 movie When Harry Met Sally. It is said by Meg Ryan's character Sally when she orders food at a restaurant, and it has become a popular catchphrase. The crossword solutions for this phrase are SAME, which is a four letter word meaning 'IDENTICAL, ' and EPIDEMIOLOGIST, which is a fourteen letter word meaning 'a scientist who studies the spread of disease.'