London: Vladimir Putin has two secret sons who love to impersonate the Disney characters he loathes, an investigation has revealed.

Ivan Putin and Vladimir Putin Jr, aged nine and five, reportedly spend most of their time at a fortified hideaway in Valdai, north of Moscow.

Their mother is Alina Kabaeva, 41, a retired Olympic gymnast and the 71-year-old’s longtime lover, according to an investigation by the Dossier Centre, which was founded by the exiled former oligarch and opposition activist Mikhail Khodorkovsky.

The children are said to live a luxurious but isolated life at a variety of presidential residences, where they are taken care of by round-the-clock teachers, nannies, personal chefs, drivers, sports trainers and tutors.

The two boys are also free to play with a large assortment of Lego sets, as well as two ponies, rabbits and a St Bernard dog that are cared for by agents from the Kremlin’s Federal Security Service (FSB).

They drink only from their own personal mugs, like their father, who is frightened of being poisoned, and have separate special meals prepared for them. They eat with staff at breakfast and noon, then take an afternoon nap.

Visits from their father are said to be “special” occasions for the boys, with the Russian president reported to especially enjoy playing ice hockey with the elder son, Ivan.

The teams in these matches are made up entirely of FSB agents, apart from the two Putins, who always play on the same side.