shared a tribute to her late costar, Ned Eisenberg, to her Instagram account on Wednesday.

The 58-year-old actress penned a message about the loss of her late Law & Order: SVU castmate and lauded his affable personality and professionalism as a performer.

The late actor passed away this past Sunday at his home in New York at the age of 65 after battling cancer. 

In remembrance: Mariska Hargitay shared a tribute to her late costar, Ned Eisenberg, to her Instagram account on Wednesday; she is seen in February

'My heart is so full of sadness over the loss of our dear, dear Ned Eisenberg,' Hargitay began. 

The actress then remarked that the late performer had graced the lives of those around him both on and off set.

'What a light and what a love. And such a first-rate actor, which pales next to him as a first-rate human. We will remember him always with his bright, mischievous smile and his wide-open heart,' she wrote.

Opening up: The 58-year-old actress spoke about the loss of her late Law & Order: SVU castmate and lauded his affable personality and professionalism as a performer

Fond memories: The actress then remarked that the late performer had graced the lives of those around him both on and off set

Hargitay then concluded her message by writing: 'We love and miss you, sweet Ned.'    

The Mare of Easttown star had been privately battling cholangiocarcinoma and ocular melanoma for the past two years, and his wife confirmed the news in a statement to  this past Monday. 

'As Ned would say, he was attacked by two very rare assassins — cholangiocarcinoma and ocular melanoma,' his wife Patricia said.

Law & Order: SVU star Ned Eisenberg dead at 65 following private two-year battle with cancer (Pictured above in 2012)

'Over the course of two years, he bravely fought the cancers in private while continuing to work in show business to ensure that his medical coverage paid for himself and his family.'

His representative Jeremy Leiner of Nicolosi & Co. announced confirmed to that he passed away this past Sunday at his home in New York.

The character actor is survived by his wife Patricia and his son, Lino.

Eisenberg was born in New York and attended the famed Fiorello H. LaGuardia High School of Music & Art and Performing Arts in Manhattan where he studied acting. 

Character actor: He recently played Detective Hauser on the hit HBO drama Mare of Easttown, starring opposite Oscar-winner Kate Winslet (filmed in late 2019, pictured above) 

He recently played Detective Hauser on the hit HBO drama Mare of Easttown, starring opposite Oscar-winner Kate Winslet.

Eisenberg also starred as Lou Rabinowitz on the hit Amazon show The Marvelous Mrs. Maisel. 

His other recent TV credits include The Blacklist, Elementary, Bull, Madam Secretary and The Good Wife. 

Many viewers will remember him most from the Law & Order franchise including Law & Order: Criminal Intent and Law & Order: Special Victims Unit.