Photo: Maarten de Boer/NBCUniversal/Getty; Walter McBride/Corbis/Getty

Mariska Hargitayis mourning the loss ofLaw & Order: Special Victims Unitcostar Ned Eisenberg.
On Wednesday, the actress, 57, paid tribute to her late colleague onInstagramfollowing his passing on Sunday.
“My heart is so full of sadness over the loss of our dear, dear Ned Eisenberg,” she began the heartfelt message. “What a light and what a love. And such a first-rate actor, which pales next to him as a first-rate human.”
She added, “We will remember him always with his bright, mischievous smile and his wide-open heart. We love and miss you, sweet Ned.”
In addition to the note, Hargitay also posted a picture of the actor smiling while dressed in a suit. She wrote in the caption, “It is a sad day in the SVU history he was a really good lawyer😢.”
Eisenberg died on Sunday at his home in New York, his agents at Nicolosi & Co.confirmed to PEOPLE. TMZ was the first to report the news of the actor’s death.
Prior to his passing, the actor had been battling two forms of cancer: cholangiocarcinoma and ocular melanoma. In a statement shared with PEOPLE, Eisenberg’s wife, Patricia, said he “bravely fought” his cancer diagnoses.
Never miss a story — sign up forPEOPLE’s free weekly newsletterto get the biggest news of the week delivered to your inbox every Friday.
John Lamparski/WireImage

Eisenberg, who was born in the Bronx, began his career in theater with a role in Neil Simon’sBrighton Beach Memoirs. He later landed a part in a Broadway production ofThe Green Bird, among other stage roles.
source: people.com