Because it’s based on real-life DNA. Indeed, O’Donnell’s 24-year-old namesake Christopher aka Chip is the fifth and last of the actor’s kids to guest on NCIS: LA. Daughter Lily played ...

NCIS: Los Angeles' star Chris O’Donnell has five kids: Lily, Chip, Charlie, Finley and Maeve Katie Mannion is a contributing writer at PEOPLE. She has been working at PEOPLE since 2022.

Christopher Eugene O’Donnell Jr., known as Chip, was born in 2000, followed by sons Charlie and Finley in 2003 and 2006, respectively. In 2007, the family welcomed their youngest, daughter Maeve ...

“That is the only child of Chris O’Donnell’s that hadn’t appeared on the show yet,” NCIS: LA showrunner R. Scott Gemmill shares with TVLine. “That’s Chris’s oldest son, Chip.