President Donald Trump is adding a familiar face to his legal team in the coming days.
"My advice on Mueller has been this: He should be allowed to do his job, he's entitled to do his job", Giuliani said.
Giuliani will work with lawyers Ty Cobb and Jay Sekulow.
This post has been updated.
"I'm going to join the legal team to try to bring this to a resolution", Giuliani told The Post.
Giuliani added that a decision on whether Trump should agree to be interviewed by the special counsel's team will be "up to the president" but "we'll hash that out".
Giuliani's entrance also comes as sources close to another attorney of Mr. Trump's, Michael Cohen, fear Cohen could flip on the president, after raids on Cohen's home, office and hotel room, CBS News' Jeff Pegues has reported.
The new additions to the president's legal team follow on the departure of his former lead outside attorney in the Russian Federation investigation, John Dowd.
The previous head of that team, John Dowd, quit last month amid disagreements about strategy. During Trump's transition period, Giuliani's name was often floated as a possibility for the secretary of state post that eventually went to - and was later yanked from - ExxonMobile CEO Rex Tillerson. The Raskins, who operate a law firm in southern Florida, have worked in various USA attorney's offices as well as at Justice Department headquarters in Washington, D.C. Instead, Trump named the former mayor an informal adviser on cybersecurity issues. NPR's Amy Held laid out the many lawyers linked to Trump who ended up not joining the team - most recently frequent Fox News contributor Joseph diGenova and his wife, lawyer Victoria Toensing.
A two-term mayor, Giuliani came to prominence as a hard-charging Manhattan federal prosecutor who targeted the city's top mob bosses and Wall Street fraudsters.