As deputy mayor, Ms Gavron will play a key role in Mr Livingstone's new administration. She will continue to be involved in advising the mayor on strategic planning decisions.
Ms Gavron will also play a leading role on the agenda for women in London, as well as on children and family policies. She will contribute at a senior level to the mayor's work with the London boroughs.
The deputy mayor will sit on a number of key committees that advise the mayor including the Greater London Authority Integration Unit.
Mr Livingstone said:
'I am pleased that I will have a Labour deputy mayor for the full four year term. Nicky Gavron was an important part of my last administration. She will continue to play a lead role supporting me on strategic planning and her additional responsibilities for this second term in helping me develop policies on the environment and families are a reflection of Nicky's commitment to London.'
Ms Gavron said:
'I'm delighted that Ken has been re-elected and to be working alongside him as his deputy. We have agreed I shall focus on two major challenges, making London the green capital of Europe and turning it into a more child-friendly city.'
The deputy mayor is automatically a member of the Metropolitan Police Authority.