Maggie Pierce

Maggie Pierce
Grey's Anatomy character
The season thirteen promotional photograph of Kelly McCreary as Dr. Maggie Pierce
First appearance	"Everything I Try to Do, Nothing Seems to Turn Out Right" 10x23, May 8, 2014 (as recurring cast) "All I Could Do Was Cry" 11x11, February 12, 2015 (as main cast)
Created by	Shonda Rhimes
Portrayed by	Kelly McCreary
Information
Nickname(s)	Maggie Sherlock The Perfect 12 year old Mags The Good Sister The Crazy Sister The Child-Prodigy Little Maggot Pierce Dr. Blabbermouth
Species	Human
Gender	Female
Occupation	Attending cardiothoracic surgeon at Grey Sloan Memorial Hospital
Title	Chief of Cardiothoracic Surgery M.D. F.A.C.S.
Family	Diane Pierce (adoptive mother) (deceased) Bill Pierce (adoptive father) Ellis Grey (biological mother, deceased) Richard Webber (biological father) Meredith Grey (biological half-sister) Catherine Avery (biological stepmother) Jackson Avery (biological stepbrother)
Significant other(s)	Dean (ex-fiance) Ethan Boyd (ex-boyfriend) Andrew DeLuca (ex-boyfriend)
Relatives	Derek Shepherd (brother in-law, deceased) Zola Grey Shepherd (half-niece) Bailey Shepherd (half-nephew) Ellis Shepherd (half-niece)
Nationality	American

Margaret "Maggie" Pierce, M.D. is a fictional character from the American television medical drama Grey's Anatomy, which airs on the American Broadcasting Company (ABC) in the United States. The character was created by series producer Shonda Rhimes and is portrayed by actress Kelly McCreary from the tenth season's penultimate episode onwards. It is revealed in the "season ten finale", Maggie's biological parents are Richard Webber (James Pickens Jr.) and Ellis Grey (Kate Burton), making her Meredith's half-sister. McCreary was upgraded to a series regular in the eleventh episode of the eleventh season.

Pierce has been described as "perky" and "chatty", as well as focusing mostly on her academic career rather than social life, causing her to be socially inept at times and childlike. She graduated from high school and medical school early, and becomes the head of her department at the young age of 31 years old. McCreary was well received upon her introduction.

Maggie is first introduced in the penultimate episode of the tenth season. Cristina Yang (Sandra Oh) interviews various different candidates to replace her as the head of her department in Cardiothoracic surgery. Maggie, having finished high school and medical school early, becomes head of her department at 31 years old. It is revealed in the season 10 finale "Fear (of the Unknown)", Maggie's biological mother was Ellis Grey.Richard Webber is shocked by this, knowing he is her biological father. Throughout the eleventh season, Webber struggles to deal with the revelation and keeps it from Maggie. Maggie explains that 2 years prior, she looked for her birth mom and needed to go to the court for the records. She found out that she was dead, but got her name, and discovered that she was an amazing surgeon that worked at the Seattle Grace Hospital. She stated that that's not why she took the job, but it's "a little bit" why she took the interview.