– Boris Johnson, Mayor of London
Tessa has undoubtedly made a huge contribution to the fabric of our city and its people. But it is her work on the Olympics that stands out.
As mayor of the host city I worked closely with Tessa in the run-up to London 2012, a Games that she played a huge part in ensuring were indeed the greatest ever staged.
I wish her well in whatever path she may choose next!
Tottenham MP David Lammy, another of those who have expressed an interest in being Labour's London mayoral candidate, was among those paying tribute to Tessa Jowell on Twitter:
Sad my good friend @jowellt standing down after 21 years of service. Feel very fortunate to have worked alongside her as Culture Minister.
Shadow business secretary Chuka Umunna added:
My Lambeth neighbour, political mum and Labour legend, @jowellt, has announced she is stepping down at the next General Election this eve
In a letter to her Dulwich and West Norwood constituency party she said quitting the south London seat was "the hardest decision I have ever taken", adding:
– Dame Tessa Jowell MP
It is really too early for anyone to be declaring themselves ahead of the local elections next year and the general election in 2015.
I love London and, of course, when the time comes will think hard about whether I should offer myself as a candidate.
Dame Tessa Jowell has fuelled speculation she is preparing for a bid to run as London's Mayor after announcing she will retire as an MP at the next general election.
The Labour MP played a crucial role in bringing the 2012 Olympics to London. Her Commons career will come to an end after 23 years in 2015.
Dame Tessa Jowell is to retire as an MP at the general election after nearly a quarter of a century in the Commons, the former Cabinet minister has told her local constituency party.
The Labour stalwart, who served in Tony Blair and Gordon Brown's Cabinets and as culture secretary played a central role in bringing the 2012 Olympics to London, is not seeking re-election in 2015.
The Dulwich and West Norwood MP stepped down from the Shadow Cabinet last year after seeing the hugely-successful Games through to their closing ceremony as shadow Olympics minister.
The former culture secretary Tessa Jowell, who is MP for the neighbouring constituency of Dulwich, has condemned the anti-Thatcher celebrations in Brixton and elsewhere in the UK as "disrepectful":
Democracy must always embrace legitimate dissent but the action in Brixton and elsewhere is disrespectful and completely out of order
Olympics involves 19 government departments. Hunt says no room for complacency. @londontonight
Hunt on Tessa Jowell: "We are very much in her debt" @londontonight