|Days of Our Lives|
|Portrayed by||Emma, Kate and Miller Kamienski (2020)|
|Current status||Former; Recurring|
|First appearance||November 11, 2019|
|Cause/reason||Appeared in flashbacks|
|Created by||Ron Carlivati|
|Introduced by||Ken Corday,Albert Alarr and Greg Meng|
|Born||May 10, 2020|
|Died||May 10, 2020|
|Cause of death||Internal injuries from the car accident caused by Orpheus.|
Mackenzie Horton was born during a Days of Our Lives time jump off-screen in April 2020.
On November 11, Mackenzie Horton is seen with her mother Sarah and legal surrogate father Xander together when her father Eric arrives and see her mother Sarah he was shocked to see a baby girl in her arms and questions Sarah about who the baby girl father and her mother Sarah lied saying Xander her "father" and Eric just left as Sarah and Xander kiss while he holding her and her mother just looks happy as she witness it all even talking about how Xander was there for all the birth class, doctor's appointments and the birth within a 6 Months time frame.
Recently, her parents Eric and Sarah discovered that they've been raising Brady Black and Kristen DiMera's daughter Rachel Black, while their real daughter had died from internal injuries sustained from the car accident, which also caused the death of Adrienne Johnson on Mother's Day. Sarah later kidnapped Rachel and headed for her cousin Abigail and Chad DiMera's apartment in Paris.
After her mother returned Rachel to her parents, she went to visit her mother in Prison. The real truth about Mackenzie's death is revealed actually on May 15, 2020, after her brother Christian's conviction for Jordan Ridgeway's murder, his sister Zoey Burge revealed it was their father Orpheus, who caused the fatal car crash that resulted in the deaths Mackenzie and Adrienne Johnson Kiriakis