London's famous Victoria & Albert (V&A) Museum had previously turned down the opportunity to display Thatcher's wardrobe, leading to her family's decision to auction off the belongings, from her red dispatch box to her wedding dress, one-by-one next month.
Christie's will conduct the auction on behalf of Lady Thatcher's children, Mark and Carol, 'The Telegraph' said.
The items of the late Prime Minister's wardrobe, including her famous power suits, handbags and jewellery, will be sold with the proceeds to be split among her children.
"These auctions present unique opportunities, across price levels, for collectors around the world to acquire property from the longest serving Prime Minister of the United Kingdom in the 20th century and the only woman to have held office to date.
The V&A said it refused the collection on the basis that they collect only items of "outstanding aesthetic or technical quality" rather than those with "intrinsic social historical value".
The items had been left as part of Lady Thatcher's estate, which bequeathed a third of her inheritance to each of her children, Sir Mark and Carol, and the remaining third in trust for her grandchildren.
