| Lucy Knight | |
|---|---|
 Kellie Martin as Lucy Knight | |
| First appearance | September 24, 1998. (5x01, "Day for Knight") |
| Last appearance | February 17, 2000. (6x14, "All in the Family") |
| Portrayed by | Kellie Martin |
| Duration | 1998–2000 |
| In-universe information | |
| Title | Medical Student (1998–2000) Psych Resident (Posthumous offered position) (2001) |
| Occupation | Physician |
| Family | Barbara Knight (mother) Mr. Knight (father) |
Lucy Knight is a fictional character from the NBC television series ER, portrayed by actress Kellie Martin. The character was part of the show for the fifth and sixth seasons. When she was first introduced on ER, Dr. Doug Ross called her a "by the book" medical student. Kellie Martin's image was removed from the main cast opening credits in the 15th episode of season 6.