Farina is survived by his longtime love Marianne Cahill, three sons and six grandchildren. His costars, friends and fans took to Twitter to express their condolences.

Dennis Farina, passed away suddenly July 22, beloved father to sons Dennis Farina (and wife Joy),Michael Farina (and wife Michelle), and Joe Farina (and wife Heather); beloved grandfather to Michae… ...

Farina is survived by three sons, six grandchildren and his partner of 35 years, Marianne Cahill. (Reporting by Eric Kelsey; Editing by Dan Whitcomb and Andre Grenon) ...

Actor Dennis Farina arrives at the Hollywood premiere of the HBO series "Luck" in Los Angeles, California in this file photo taken January 25, 2012.

Farina died suddenly Monday morning in Scottsdale, Ariz., after suffering a blood clot in his lung, Farina's publicist said. He' survived by three sons, six grandchildren and Marianne Cahill ...

He also has two granddaughters and four grandsons. "Farina's rep says the actor is also survived by 'the love of his life of 35 years, Marianne Cahill.' It doesn't appear the two were ever married." ...

Farina died in Scottsdale, Arizona, and is survived by three sons, six grandchildren and his partner of 35 years, Marianne Cahill. Memorial services have not yet been announced.

Farina is survived by "the love of his life of 35 years, Marianne Cahill," according to his publicist, as well as three sons from his marriage to Patricia Farina, which ended in divorce in 1980 ...

Gov. Pat Quinn on Monday proclaimed the day "Dennis Farina Day in Illinois" as family and friends turned out to say goodbye to the beloved Chicago police officer-turned-popular "Law & Order" actor ...

In the kind of roles I do, you can do them and walk away from it and have a really nice time.’’ Farina is survived by three sons, six grandchildren and his longtime partner, Marianne Cahill.

Farina is survived by three sons, six grandchildren and his partner of 35 years, Marianne Cahill. (Reporting by Eric Kelsey; Editing by Dan Whitcomb and Andre Grenon) ...

The actor is survived by his three sons, six grandchildren and the love of his life of 35 years, Marianne Cahill. Funeral services are pending. Time staff writer Greg Braxton contributed to this ...