NCIS: Where Are They Now?

Longtime NCIS fan favorite Pauley Perrette has announced that she'll be leaving at the end of the show's 15th season. But after a decade and a half on the air, the NCIS cast has dealt with many a change. Here's what the original stars of the hit CBS crime show have been up to since the series premiered in 2003.

Since NCIS debuted in 2003, Harmon has starred as former U.S. Marine Corps scout sniper turned special agent Leroy Jethro Gibbs.

On Oct. 4, it was annouced that Perrette would be leaving NCIS after playing the team's forensic scientist for 15 seasons. She also appeared as Abby in spinoffs NCIS: Los Angeles and NCIS: New Orleans.

Since leaving NCIS after the show's third season, the actress went on to notably star in the TNT crime drama Rizzoli & Isles as Dr. Maura Isles; that series ended in 2016. For her role as Isles, Alexander won a People's Choice Award.

McCallum has continued to play the role of NCIS chief medical examiner Ducky since the series premiere.

Weatherly portrayed senior NCIS Special Agent Anthony DiNozzo for 13 seasons. Since his run on the show ended, he's been starring as Dr. Jason Bull on the CBS drama Bull, which just began its second season.

Having guest-starred as computer specialist Timothy McGee in several episodes of NCIS' first season, Murray graduated to the main cast the following year (and remains there). He also appeared in an episode of NCIS: New Orleans.

A recurring character since the first episode, Spano portrays Gibbs' FBI counterpart and longtime friend, T.C. Fornell. Spano will reportedly be back in season 15, and his other TV credits since 2003 include The Closer, The Mentalist, and NCIS: New Orleans.

Demmings' character, assistant medical examiner Gerald Jackson, survived being shot by a terrorist in season 1 and captured by the same villain in season 3. Though Gerald hasn't been seen since, Demmings has appeared on 24, CSI: NY and Bones.