Assange is being held in jail while U.S. authorities seek his extradition to face trial on 18 counts relating to WikiLeaks' release of vast troves of confidential U.S. military records and diplomatic cables more than a decade ago.

"I am very happy and very sad. I love Julian with all my heart, and I wish he were here," Moris said outside the gates of Belmarsh prison following the ceremony.

The 50-year-old Australian, who denies any wrongdoing, has been in the southeast London jail since 2019, and before that was holed up in the Ecuadorean Embassy in the British capital for seven years.

While living at the embassy he fathered two children with Moris, a lawyer more than a decade his junior, whom he met in 2011 when she started work on his legal team. Their relationship began in 2015.