Zbigniew Brzezinski dies at age of 89World May 27, 6:57
More than two-thirds of Russians say would like to venerate St Nicholas’s relicsSociety & Culture May 27, 6:40
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Hungarian top diplomat: EU must discuss anti-Russian sanctionsWorld May 26, 19:56
Russian, French top diplomats discuss preparations for Putin’s visit to FranceRussian Politics & Diplomacy May 26, 19:47
Moscow comments on Tallinn’s move to expel Russian diplomatsRussian Politics & Diplomacy May 26, 19:43
WADA: Legendary Isinbayeva suits role of ambassador for clean sports in RussiaSport May 26, 19:33
Russia working on advanced air defense systemMilitary & Defense May 26, 19:17
"The Queen and members of both families are delighted with the news," Buckingham Palace said in a statement. giving no details of when the baby was due.
The couple's first child, Prince George, was born in July 2013 and is third in line to the throne.
The duchess is being treated by doctors at Kensington Palace, Buckingham Palace said.