NCIS is a TV staple that has been on air for over two decades with multiple spin-offs including NCIS: New York, NCIS: Sydney, and NCIS: Hawai'i.
Despite longtime NCIS star Mark Harmon leaving the series during season 19, he affectionately referred to the cast and crew as "one big family." But what about their real families? Here's all you need to know about the partners and children of all the NCIS stars, past and present…
Vanessa Lachey
© @vanessalachey/InstagramNCIS: Hawai'i star Vanessa Lachey played Special Agent Jane Tennant for three seasons, from 2021 to 2024. Off-screen, she married Nick Lachey in 2011 and together they share three children, sons Camden, and Phoenix, and daughter Brooklyn. The couple are the hosts of the wildly popular reality dating show, Love Is Blind.
Mark Harmon
© Photo: InstagramMark Harmon comes from quite a famous family. His father was the football player and sports broadcaster Tom Harmon, and his mother was the black and white movie star, Elyse Knox. As for his own family, he has been married to actress Pam Dawber since 1987.
The couple share two sons, Sean, 38, and Ty, 33. Sean even appeared on NCIS, playing a young version of his father's character, Leroy Jethro Gibbs, in flashback episodes.
Katrina Law
© GettyKatrina Law was welcomed to the NCIS cast at the end of season 18 and brought back as a series regular portraying Agent Jessica Knight in 2021. Katrina married to actor Keith Andreen in 2013, who she first met on the set of the TV show The Resistance in 2010. They welcomed their first child, daughter Kinley into the world in December 2018.
But, after 12 years of marriage in July 2025, Katrina filed for divorce from Keith, citing "irreconcilable differences" and reportedly sought primary physical custody of their daughter.
Brian Dietzen
© @briankdietzenBrian Dietzen plays Dr. Jimmy Palmer on the show. While his character experienced some family tragedy, in real-life Brian is happily married to his wife Kelly with whom he shares two children. He tends to keep his personal life away from the spotlight, but in November 2022, he appeared to reveal his children's names for the first time in a post on social media.
Sharing a photo of some personalized golf wedges, Brian revealed the names of his children, Clover and Satchel. He wrote: "Kiddos names! Musical notes for my daughter, and an Overwatch logo for my son!"
Michael Weatherly
© @M_Weatherly/XFormer NCIS star Michael Weatherly left the show in 2016 to be able to spend more time with his young children. He shares daughter Olivia and son Liam with his wife of 14 years, Bojana Jankovic. He also has a son, August, 30, from his first marriage to Amelia Heinle, which lasted two years.
Sean Murray
© Photo: InstagramSean Murray plays special agent Timothy McGee in NCIS, and his real-life stepsister, Pretty Little Liars actress Troian Bellisario played his sister in the show too. He is the proud dad to two children, a daughter named Caitlyn and a son named River who he shares with his ex-wife, Carrie. The couple married in 2005, but separated in March 2024 and finalized their divorce in May 2025.
Wilmer Valderrama
© InstagramWilmer Valderrama joined the NCIS cast as agent Nicholas Torres in 2016. The actor has had several high-profile relationships over the years, notably with Lindsay Lohan and Demi Lovato. In 2020, he announced his engagement to his girlfriend of eight months Amanda Pacheco, and shortly before Christmas, the couple confirmed they were expecting.
On February 15, 2021, they welcomed their daughter, Nakano Oceana, named after a trip the couple took to Japan where they decided they "would really be together" and also after Takeko Nakano, a female samurai. Four years later, on July 11, 2025, Wilmer and Amanda welcomed their son Wolf Monte.
Emily Wickersham
© Photo: InstagramEmily Wickersham left NCIS at the end of season 18, but she soon followed up with a more important role – mom. The actress, who played Agent Ellie Bishop on the procedural drama, welcomed her first child, son Cassius, with her partner, actor James Badge Dale, on 30 December 2021.
Three years later, on October 2, 2024, Emily gave birth to her second son, Zephy Badgett.
LL Cool J
© Photo: Getty ImagesLL Cool J first starred in the NCIS spin-off series NCIS: Los Angeles as Sam Hanna in the early 2000s. He went on to appear in NCIS: Hawai'i and will soon star in NCIS's latest spin-off, NCIS: New York. Away from the cameras, he is happily married to his wife Simone I. Smith. The two met when LL was a young rapper and dated for eight years before tying the knot in 1995.
They share four grown-up children together – son Najee, 36, and daughters Italia, 35, Samaria, 30, and Nina, 25. While LL's three eldest children have pursued careers away from the limelight, the youngest Nina has decided to follow in her famous dad's footsteps and is an aspiring R&B singer.
Daniela Ruah
© InstagramActress Daniela Ruah, who stars as Special Agent Kensi Blye, met her husband on the set of NCIS: Los Angeles. She and stuntman David Olsen married in 2014. Not only is he the stunt double for actor Eric Christian Olsen, but his older brother too. Today, Daniela and David are parents to two children – son, River and daughter, Sierra.
Chris O'Donnell
© Jim Ruymen/UPI/REX/ShutterstockChris O'Donnell starred in NCIS: Los Angeles as Special Agent G. Callen from 2009 until its final season in 2023. While his character isn't exactly known for being a family man, the actor has been married for over 20 years and is a father of five.
He shares Lily, 26, Christopher, 25, Charles, 22, Finley, 20, and Maeve, 18, with his wife Caroline Fentress. Almost all his family appeared on the show throughout the years. His youngest, Maeve, was the most recent guest star in 2015 when she appeared alongside her mom during an episode.
