Mr Harris confirmed that a further £25.7million will invested in the project, which completes the £58m central Government contribution.
The money will pay for renovation works along the existing Metrolink system, including the upgrading of bridges, cabling and overhead lines as well as junction improvements on the Eccles line.
The first round of refurbishment works were approved in July 2006.
Mr Harris said: “This funding marks the last piece of a historic funding package for Manchester Metrolink, which will bring the service up to modern standards.
"The tram is clearly important to Manchester's travelling public and I am glad that it's long term future is now secured."