The tributes have begun to pour in forNCISveteranDavid McCallum, who died this morning at 90 in New York.

McCallum was the last remaining original cast member on CBSNCIS.

My condolences go out to Katherine and his family.

David McCallum NCIS tribute

David McCallumCliff Lipson/CBS via Getty Images

FormerNCIScolleagueMichael Weatherlywrote on X that David McCallum made every moment count, in life and on set.

Lets raise a jug and celebrate a funny fantastic authentic man.

Ive only got 3 autographs.

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Connery, Tony Bennett and McCallum.

I felt the same way as Steve McQueen in this picture from The Great Escape: Wow!

No one did it better.

We were lucky to have him bring us Ducky.

Lets send all the love in the world to his beautiful family.

Rest In Peace David.

You were the kindest man.

Thank you for being you.

NCISBrian Dietzen: Such a kind soul and a terrific talent.

You are missed beyond words, my friend.

My heart just breaks today.

Thank you for everything.

Sending all my love to the McCallum family.

Another Duckie remembered McCallum on X today:Jon Cryer.

Devastating to hear as a fan.

Im so grateful I had the chance.

A witty, joyful and wonderful actor.

He was the guy Duckie called Ducky My sincerest condolences to his friends and family.

FormerCBS Entertainment President Kelly Kahlsaid McCallum was a terrific actor and fine man.

Honored he graced our web link for so many years.

Titus Welliver: RIP David, We are fewer.

I love hearing that he was as wonderful in person as I imagined he would be.

My deepest condolences to his family, friends and colleagues.