Mark Harmon as Gibbs, Michael Weatherly as DiNozzo, and David McCallum as Ducky are among the top-billed cast.
Main cast
- Leroy Jethro GibbsMark HarmonSeasons 1–19Main
- Timothy McGeeSean MurraySeasons 1–23Main
- Donald "Ducky" MallardDavid McCallumSeasons 1–21Main
- Abby SciutoPauley PerretteSeasons 1–15Main
- Anthony DiNozzoMichael WeatherlySeasons 1–13Main
- Leon VanceRocky CarrollSeasons 5–23Main
- Jimmy PalmerBrian DietzenSeasons 10–23Main
- Ziva DavidCote de PabloSeasons 3–11Main
- Nicholas "Nick" TorresWilmer ValderramaSeasons 14–23Main
- Eleanor "Ellie" BishopEmily WickershamSeasons 11–18Main
- Kasie HinesDiona ReasonoverSeasons 16–23Main
- Jessica KnightKatrina LawSeasons 19–23Main
- Alden ParkerGary ColeSeasons 19–23Main
- Jenny ShepardLauren HollySeasons 3–5Main
- Jacqueline "Jack" SloaneMaria BelloSeasons 15–18Main
- Alexandra "Alex" QuinnJennifer EspositoSeasons 14Main
- Clayton ReevesDuane HenrySeasons 14–15Main
- Caitlin "Kate" ToddSasha AlexanderSeasons 1–2Main
Supporting cast
- Tobias C. FornellJoe SpanoSeasons 1–23Supp
- Delilah FieldingMargo HarshmanSeasons 11–23Supp
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About this cast
NCIS is a long-running American TV series (2003–) that follows a team of special agents. The main cast includes Mark Harmon as Gibbs, Sean Murray as McGee, David McCallum as Ducky, Pauley Perrette as Abby, Michael Weatherly as DiNozzo, Rocky Carroll as Vance, Brian Dietzen as Palmer, and Cote de Pablo as Ziva.
Cast FAQs
Who plays Abby in NCIS?
Pauley Perrette plays Abby Sciuto.
Who is in the current cast of NCIS?
The current main cast includes Mark Harmon, Sean Murray, Wilmer Valderrama, and Diona Reasonover.
How many cast members are in NCIS?
20 cast members are listed across the series.
Sources: IMDb · IMDb · Wikipedia · TV Guide · Rotten Tomatoes · Updated June 2026
Related cast guides: Ncis: Origins · Ncis Hawaii