On February 6 Cook said, "It's been a huge honour to be England captain and to lead the Test team over the past five years".
"The senior guys in the changing room play a very influential role and whilst there's a natural progression for me it's a huge support to know that they are there to help and advise".
Root, who has played 53 Tests, will not be thrust into front-line action until July's series with South Africa as limited-overs cricket and the Champions Trophy forms the initial focus of the worldwide summer.
Yorkshire batsman Root, previously England's vice-captain, had always been the favourite to take over from Alastair Cook, who resigned as Test skipper last week after a national record 59 matches in charge.
The Telegraph report also added that all-rounder Ben Stokes has been widely tipped to become Root's deputy.
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Strauss described Root as the right man to succeed Cook, saying, "Joe has shown a number of admirable qualities in his Test career so far".
"He is universally respected by his team-mates, passionate about driving the Test team forward and extremely excited about the prospect of leading his country". Only India's Virat Kohli has scored more than Root's 4594 Test runs since then.
With a three-match series at home to West Indies following immediately after the visit of the Proteas, Root will have seven Tests in total to shape his side before the defence of the Ashes gets underway at the Gabba in Brisbane on 23 November. England lost the Test series by 4-0. In limited overs cricket, Eoin Morgan continues to remain the England skipper.
The Sheffield-born star has been appointed as captain ahead of England's One-Day tour of the Caribbean in early March.
Former captain Nasser Hussain, who captained England between 1999 and 2003, believes a Root-led side will adopt a more combative approach than teams under the most recent incumbents. "The great thing about the next Test match not being till July against South Africa, is there is no real rush to make the decision". After Alastair Cook stepped down last week, the Selectors and I engaged in the proper process to appoint his successor.