A younger version of Dr. Donald "Ducky" Mallard has been cast on NCIS.

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Actor Adam Campbell - who starred in ABC's Mixology - snagged the role, according to TVGuide.com.

Executive producer Gary Glasberg explained why Campbell was the perfect fit.

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"When we saw Adam, all we could think of was a young David McCallum," Glasberg said in a statement. "We can't wait to introduce him as young Ducky and watch what he brings to this unusual role."

Campbell will appear in an episode in October via flashbacks that will bring fans closer to the character played by David McCallum. The episode will explore Ducky's past relationships and also reveal "why he has a penchant for bow ties."

However, McCallum - one of the show's original cast members - won't be the only character in focus. Glasberg also has some big plans for fan favorite Tony DiNozzo (Michael Weatherly).

"It's time for Tony to continue to grow a little bit," Glasberg previously told TVLine.com. "He went through a lot last year emotionally and tried to deal with Ziva's departure as he could."

Ziva David, played by Cote de Pablo, emotionally left the show back in October but Tony's sadness will soon be gone. Glasberg plans to introduce Tony to a new love interest. And, Tony will meet this lady through a case. "We'll be mature about it and handle it properly, and Michael's excited about it," Glasberg added.

Season 12 of the hit CBS show will premiere at 8/7c on Tuesday, Sept. 23. The new spin-off, NCIS: New Orleans, will kick off right after.

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