JJ Deveraux

In-universe information
In-universe information
Other names	Jack Patrick Deveraux, Jr.
Occupation	Emergency medical technician (2018–present); Detective (2017–2018); Police cadet (2015–2017)
Father	Jack Deveraux
Mother	Jennifer Horton
Sisters	Abigail Deveraux
Half-sisters	Gwen Rizczech
Grandfathers	Duke Johnson ; Bill Horton ; Harper Deveraux (adoptive)
Grandmothers	Jo Johnson ; Laura Horton ; Camille Deveraux (adoptive)
Uncles	Steve Johnson ; Mike Horton ; Lucas Horton
Aunts	Adrienne Johnson Kiriakis
Nephews	Thomas DiMera
Nieces	Charlotte DiMera
First cousins	Jeremy Horton ; Stephanie Johnson ; Victor Kiriakis II (adoptive) ; Joey Kiriakis (adoptive) ; Sonny Kiriakis ; Will Horton ; Allie Horton ; Joey Johnson ; Tripp Dalton

JJ Deveraux
JJ Deveraux
Days of Our Lives character
	Casey Moss as JJ Deveraux
Portrayed by	Tyler Lake (2004); Jake and Nick Ravo (2005); Jacob and Micah Reeves (2005–2006); Casey Moss (2013–present);
Duration	2004–2006; 2013–2020; 2022; 2024;
First appearance	November 12, 2004
Classification	Present; guest
Created by	James E. Reilly
Introduced by	Ken Corday and Stephen Wyman (2004); Ken Corday, Lisa de Cazotte and Greg Meng (2013); Ken Corday and Albert Alarr (2020, 2022); Ken Corday and Janet Spellman-Drucker (2024);
Other names	Jack Patrick Deveraux, Jr.
In-universe information
Other names	Jack Patrick Deveraux, Jr.
Occupation	Emergency medical technician (2018–present); Detective (2017–2018); Police cadet (2015–2017)
Father	Jack Deveraux
Mother	Jennifer Horton
Sisters	Abigail Deveraux
Half-sisters	Gwen Rizczech
Grandfathers	Duke Johnson ; Bill Horton ; Harper Deveraux (adoptive)
Grandmothers	Jo Johnson ; Laura Horton ; Camille Deveraux (adoptive)
Uncles	Steve Johnson ; Mike Horton ; Lucas Horton
Aunts	Adrienne Johnson Kiriakis
Nephews	Thomas DiMera
Nieces	Charlotte DiMera
First cousins	Jeremy Horton ; Stephanie Johnson ; Victor Kiriakis II (adoptive) ; Joey Kiriakis (adoptive) ; Sonny Kiriakis ; Will Horton ; Allie Horton ; Joey Johnson ; Tripp Dalton

Jack "J.J." Deveraux Jr. is a fictional character from the original NBC soap opera, Days of Our Lives. Born onscreen in 2004, the character was portrayed by several child actors between 2004 and 2006. In 2013, Casey Moss joined the cast as a rapidly aged JJ.

JJ is the son of supercouple Jack Deveraux and Jennifer Horton and younger brother of Abigail Deveraux. The character is a member of the original core family, the Horton family as well as the Johnson family. JJ shares a connection to several of the show's most popular characters and is considered a legacy character. JJ's first significant storyline launched in 2013 and focused on his rebellion following his father's death and his feud with his mother's new boyfriend, Dr. Daniel Jonas.

In 2014, JJ's storyline shifts to him meeting Paige Larson (True O'Brien), JJ cheating on Paige with her mother, Eve Donovan, and Paige discovering their affair on her birthday in 2015. Further relationships have included Gabi Hernandez (Camila Banus) and Lani Price (Sal Stowers). In 2019, he began experiencing a romantic connection with Haley Chen (Thia Megia).

Moss' performance has been met with critical acclaim, having garnered him a Daytime Emmy Award nomination for Outstanding Younger Actor in a Drama Series in 2018.