- "Unfortunately, I never got the chance to know her as an adult."
- —Leroy Jethro Gibbs
Kelly Gibbs (1983 - February 28, 1991) was Leroy Jethro Gibbs and Shannon Gibbs's daughter and the granddaughter of Jackson Gibbs, Ann Gibbs, Mac Fielding and Joann Fielding with Kelly's childhood friend being Maddie Tyler.
A sniper later shot Mitchell in the head, killing Mitchell instantly and eventually causing the crash that cost both Shannon and Kelly their lives.
A few months later, Gibbs tracked down the murderer Pedro Hernandez and killed him in revenge for Hernandez ordering the deaths of Gibbs's own family.
In Life Before His Eyes (episode), two alternate scenarios were presented regarding Kelly Gibbs alongside her mom Shannon. One, regarding Gibbs failing to avenge them, had Gibbs becoming a drunken recluse. The other, regarding their survival, had them discovering Marines at her doorstep, presumably to inform them that Gibbs had died in battle.