In Ireland, campaigners including Amnesty International Ireland and peace and justice group Afri have called for Ms Manning to be given the honour of Freedom of Dublin in recognition of what she had done. "Chelsea has served seven years in prison".
"Whatever is ahead of me, is far more important than the past", said the 29-year-old, who served seven of a 35-year sentence over one of the largest leaks of classified documents in U.S. history.
President Barack Obama commuted Manning's sentence on January 17, three days before he left the White House, setting a release date of May 17.
The Army said Wednesday that Manning remains subject to the military's criminal code until her discharge from the Army, and that her "excess leave" status will be lifted if she's prosecuted for any violations.
Chelsea Manning, the whistleblower who leaked documents to WikiLeaks on U.S. wars in Iraq and Afghanistan, was released from military prison on Wednesday.
Manning said she acted "out of concern for my country", innocent civilians who died in the wars and in support of "transparency and public accountability".
She defended her role in the the leaks saying she wanted to spark a public debate about United States foreign policy and the role of the military, but later apologised for "hurting the US".
The whistleblower released her first photo as a free woman on her Twitter page, @xychelsea and on Instagram at @xychelsea87.
A U.S Army official confirmed to NBC News that she was released from Fort Leavenworth military prison at around 3 a.m. ET.More news: FedEx confirms it was hit by global malware attack
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Poitras exec produces XY Chelsea alongside Field of Vision's Charlotte Cook, together with the Mary Burke from the British Film Institute, which co-financed the project, and First Look Media's Michael Bloom and Adam Pincus.
Chelsea Manning will participate in a documentary about the transgender soldier to be executive produced by "Citizenfour" filmmaker Laura Poitras. Producers say Manning granted filmmakers "unprecedented access". Manning's support team also provided little information, citing her need for privacy and time to adjust.
In commuting the sentence, President Obama said that the seven years' confinement was sufficient punishment and that the original sentence was disproportionate to what other leakers had received.
More recently, WikiLeaks published Democratic National Committee emails in the weeks leading up to the November 8 US presidential election.
Army spokeswoman Cynthia Smith says The transgender soldier was released from Fort Leavenworth on Wednesday.
The Obama administration argued the case was fundamentally different to that of former National Security Agency contractor Edward Snowden, who fled to Russian Federation after leaking documents on its secretive spying programme.
In spite of the challenges ahead which could possibly include a hostile administration - after all, Donald Trump labelled Manning a "traitor" and said that she "should never have been released from prison" in a tweet - Manning's ebullience for a new life is most palpable.
The former intelligence analyst in Iraq acknowledged leaking the materials, saying she wanted to expose what she considered to be the USA military's disregard of the effects of war on civilians.
They contend the Army is merely following rules in extending to Manning, 29, active-duty benefits as it would any court-martialed service member transitioning back to society.