Mr Corbyn grinned as he made his way to the front of the Opposition benches on Tuesday, to the sound of applause from his MPs.
One, Richard Burgon, claimed Prime Minister Theresa May had laughed "uneasily" at the ovation.
It was an unusual sight given Mr Corbyn's previous problems uniting his party. He has faced a number of rebellions and even a no-confidence motion despite winning two leadership elections.
Since dawn on Friday revealed the extent of her misstep at the polls, Ms May has been forced into finding allies in the Commons in order to wield enough power to pass laws.
It has driven her into the arms of the conservative Christian DUP.
A former minister, Ed Vaizey, highlighted the danger of any DUP tie-up, saying: "I come from [the] liberal wing of the Conservative party.
"I’m not going to support any legislation that I would regard as socially illiberal, or taking this country backwards."
In a dramatic intervention, Sir John warned the peace process is "fragile" and could fall part if the British Government is no longer seen as "impartial".
DUP leader Arlene Foster said of the talks on Tuesday: "Discussions are going well with the Government and we hope soon to be able to bring this work to a successful conclusion."
Join our new commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies