Abby Lockhart
| Abby Lockhart | |
|---|---|
| Maura Tierney as Abby Lockhart | |
| First appearance | November 25, 1999 (6x08, "Great Expectations") | 
| Last appearance | March 19, 2009 (15x20, "Shifting Equilibrium") | 
| Portrayed by | Maura Tierney | 
| Duration | 1999, 2000–08, 2009 | 
| In-universe information | |
| Gender | Female | 
| Title | Medical Student (2000, 2003–2004) Intern (2004–2005) Resident (2005–2008) Attending Physician (2008) | 
| Occupation | OB/GYN Nurse (1999–2000) ER Nurse (2000–2002) Nurse manager (2002–2004) Physician (2004–2008) | 
| Family | Eddie Wyczenski (father) Maggie Wyczenski (mother) Eric Wyczenski (younger brother) | 
| Spouse | Richard Lockhart (ex-husband) Luka Kovač (husband) | 
| Significant others | John Carter (ex-boyfriend) Jake Scanlon (ex-boyfriend) | 
| Children | Josip "Joe" Kovač (son with Luka, born on May 18, 2006) | 
| Born | January 10, 1969 | 
Abigail Marjorie "Abby" Lockhart, M.D. (née Wyczenski) is a fictional character from the NBC medical drama series ER, portrayed by Maura Tierney. She first appears as a guest star in the first half of the sixth season, before becoming a main character later that season, appearing until the beginning of the fifteenth season. Tierney returned to make one final guest appearance later in season fifteen.