Prime Minister Theresa May said the dignity and courage with which Dame Tessa confronted her illness was "humbling" and "inspirational", and her campaigning was a "lasting tribute to a lifetime of public service". She more than anyone made the dream of bringing the Olympics and Paralympics to London a reality, fighting hard around the Cabinet table to make it happen.
"She was completely dedicated to other people".
In 2004, she officially launched the bid and, when the Olympic and Paralympic Games were awarded to London, she was appointed Olympics Minister and held full ministerial responsibility for the bid from 2006.
"She was a fair and gracious opponent - and got rather more votes than I did". In this role, she was responsible for setting up media regulator OFCOM.
"Those tributes that were made in the Lords and the Commons". Befriending people & persuading them to back progressive causes.
"She just had this capacity to touch everybody she met".
"Tessa is much-loved across the constituency, for the things she delivered but perhaps even more for her deep empathy and compassion, and the way that she worked collaboratively to empower others", she said.
Jowell died peacefully at the family home in Warwickshire, England on Saturday evening, her family said in a statement released Sunday.
Canterbury MP Rosie Duffield also paid tribute to her fellow Labour party member.
The former Labour cabinet minister who was diagnosed with a glioblastoma multiforme brain tumour in May previous year, suffered a haemorrhage on Friday, and had been in a coma until her death on Saturday, a spokesman for the family said.
Appearing on the Andrew Marr Show this morning, former Labour director of communications and godfather to Dame Tessa's children Alastair Campbell said: "She really is the best of politics, the best of humanity, and as Tony Blair said this morning, there really aren't many like her".
"There was no-one like Tessa and no-one better. We will all miss her".
"It was a hard enough process at the best of times, but that structure she put in place then weathered the financial crisis (of 2008) and then allowed us in the end to still deliver the Olympics on time and under budget".
Sebastian Coe, the president of the IAAF and chairman of the London organising committee of the Olympic Games, described Jowell as "a life enhancer", adding: "Without Tessa there would have been no London 2012, and without Tessa they would not have been the success they were". "Our thoughts are with Tessa's family and friends and all those affected by a brain tumour".