While appearing on Wednesday's episode of Inside the Actors Studio, the American Hustle star became very emotional when host James Lipton asked her about the late Oscar winner.
"Gosh, I wish you could all get a chance to work with him. He was beautiful, a beautiful spirit. And he has this unique ability to see people, really see them," said Adams, as tears began to well up in her eyes.
"And he will be missed. Sorry, I really...I just really loved him and I know so many people did, and I just don't know how much more I can talk about it now. Sorry."
Adams, 39, worked with Hoffman in 2012's The Master and 2008's Doubt. For both films, the costars each received Academy Award nominations.
Hoffman was found dead on the bathroom floor in his New York City apartment after an apparent drug overdose on Feb. 2. He was 46.