Speaking to reporters after the visit, Ms Anderson said it was “very difficult” to see Assange in prison.
“He does not deserve to be in a supermax prison. He has never committed a violent act. He is an innocent person,” she said.
She said that Assange has no access to information, is “really cut off from everybody” and has not been able to speak to his children.
“He is a good man, he is an incredible person. I love him, I can’t imagine what he has been going through,” Ms Anderson added.
“It was great to see him, but this is just misrule of law in operation. It is an absolute shock that he has not been able to get out of his cell.”
“It is going to be a long fight and he deserves our support. He needs our support, so whatever anyone can do – maybe write to him, encourage him.”
“We just have to keep fighting, because it is unfair. He has sacrificed so much to bring the truth out and we deserve the truth.”