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Katie Abbott
Sienna Mercuri
Sienna Mercuri as Katie Abbott
The Young and the Restless
Portrayed by: Reese & Kennedy Staib (2014-2016)
Sienna Mercuri (2016-2021 & 2024-)
Duration: 2014-2021 & 2024-
First appearance: November 17, 2014
Created by: Jean Passante
Shelley Altman
Profile
Family: Abbott family
Fenmore family
Foster family
Henderson family
Newman family
Reed family
Full name: Katherine Rose Newman Abbott
Other names: Katherine Newman (name at birth)
Gender: Female
Born: November 17, 2014
Occupation: Student
Residence: Newman Ranch, Tack House
421 Larkspur Trail, Highway B
Genoa City, Wisconsin
Relationships
Parents: William "Billy" Abbott
(father)
Victoria Newman
(mother)
Siblings: Claire Newman
(maternal half-sister)
Reed Hellstrom
(maternal half-brother)
Cordelia "Delia" Abbott
(paternal half-sister)
John "Johnny" Abbott IV
(paternal half-brother/adoptive brother)
Grandparents: John Abbott Sr.
(paternal)
Jill Fenmore
(paternal)
Victor Newman Sr.
(maternal)
Nicole "Nikki" Reed
(maternal)
Great-grandparents: Robert Abbott
(paternal)
Unknown woman
(paternal)
Neil Fenmore
(paternal; biological)
Unknown woman
(paternal; biological)
William "Bill" Foster Sr.
(paternal; adoptive)
Elizabeth "Liz" Henderson
(paternal; adoptive)
Albert Miller
(maternal)
Cora Miller
(maternal)
Nicholas "Nick" Reed
(maternal)
Unknown woman
(maternal)
Aunts & uncles: John "Jack" Abbott Jr.
(paternal)
Traci Abbott
(paternal)
Phillip Chancellor III
(paternal)
Dylan McAvoy
(maternal)
Nicholas "Nick" Newman
(maternal)
John Abbott III
(maternal)
Victor "Adam" Newman Jr.
(maternal)
Abigail "Abby" Newman
(maternal)
Faith Newman
(maternal)
Cousins: Keemo Nguyen
(paternal)
John Abbott III
(paternal)
Kyle Abbott
(paternal)
Colleen Carlton
(paternal)
Phillip "Chance" Chancellor IV
(paternal)
Cassidy "Cassie" Newman
(maternal; adopted)
Noah Newman
(maternal)
Summer Newman
(maternal)
Faith Newman
(maternal)
Riley Newman
(maternal)
Connor Newman
(maternal)
Christian Newman
(maternal)
Ava Spectra
(maternal)
Dominic Chancellor
(maternal)
Other relatives: Allie Nguyen
(paternal)
Harrison Abbott
(paternal)
Dominic Chancellor
(paternal; adopted)

Katherine "Katie" Abbott is a fictional character on the CBS daytime soap opera The Young and the Restless.

Actress History:[]

  • Kennedy & Reese Staib (11/2014-06/2016; recurring)
  • Sienna Mercuri (07/2016-07/2021 & 06/2024-present; recurring)

Character History:[]

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