She used her military access to leak over 750,000 documents to WikiLeaks, defending her action as an attempt to start a conversation about what she viewed as compromising US tactics and intervention.
News, citing an unnamed US Army official, reported that Manning was released from Fort Leavenworth military prison at around 2 a.m.
Chelsea Manning's lawyer revealed shortly after Obama commuted her 35-year sentence earlier this year that the transgender army private was excited about walking free but "anxious", according to the BBC.
"It was by far the longest sentence given to any whistleblower in United States history", Pulse said, saying the film would depict "the journey of her fight for survival and dignity, and her transition from prisoner to a free woman". "I can imagine surviving and living as the person who I am and can finally be in the outside world".
In 2010, Bradley E. Manning was arrested after leaking a huge number of classified documents.
Now free, Manning has indicated she will move to Maryland.
However in 2015, in a first for the Army, she was granted access too treatments and was allowed to transition into a woman.
Even though the army eventually approved Manning's requests for hormone therapy, the protracted legal battles earned her significant media attention among advocates.
She revealed previously unknown killings of civilian bystanders in Iraq and Afghanistan, classified intelligence assessments of Guantanamo detainees, revelations that the usa failed to investigate hundreds of reports of abuse by Iraqi police and soldiers, and blunt diplomatic assessments of us allies and adversaries.
Hugs for Chelsea includes Nash's song "Almost Gone", which the folk-rock legend co-wrote with Crosby, Stills & Nash touring keyboardist James Raymond about Manning in 2011.
The Department of Defense has repeatedly declined to discuss Manning's treatment in prison. Manning laid its civilian toll bare in an Apache airstrike video that WikiLeaks published under the name "Collateral Murder".
In 2013, Manning was convicted and sentenced to 35 years in prison for releasing classified and sensitive military documents to WikiLeaks.
Julian Assange, whose WikiLeaks was put indelibly on the global map with the Manning leaks, cheered her release.
In 2010, Manning was serving in Iraq as an analyst for the USA military.
An Army spokeswoman says Manning remains subject to the military's criminal code until her discharge from the Army.
Manning's attorneys disclosed in September that she had been approved for gender reassignment surgery.
After her release, Strangio said, "Through extended periods of solitary confinement and up against the government's insistence on denying her medical care and existence as a woman, Chelsea has emerged with grace, resilience, and an inspiring amount of love for others".
She will now assist with a documentary about her life.