The star power couple in the Obama administration, Samantha Power and Cass Sunstein, are expecting their first child, has learned.

Irish-born Power, 38, one of President Barack Obama’s most senior foreign policy advisors, and Sunstein, 54, favorite to become Obama’s first Supreme Court pick, are expecting a boy they hope to name Declan.

The couple, who were married in Ireland on July 4 last year, were named "Fun Couple of the 21st Century" by Esquire magazine in October.

Power, who is a specialist on genocide, is a Pulitzer Prize-winning author and former Harvard professor.

She was the center of a major controversy during the presidential election campaign when she described Hillary Clinton as a “monster” during an interview with a Scottish journalist. She resigned, but was later given a key role job at the National Security Agency, where she is Senior Director of Multilateral Affairs.

In that capacity she often works with Clinton on foreign policy issues such as genocide and Darfur. The two are said to have a cordial relationship.

Sunstein is head of the White House Office of Information and Regulatory Affairs, which oversees implementation of government policies on issues such as technology and privacy. He is considered one of the foremost legal scholars in the nation and is widely rumored to be Obama’s first Supreme Court choice.

Both are very close to the president, and he mentions them both in his second book “The Audacity of Hope.”

Their relationship set gossip tongues wagging when it came to light. Sunstein ditched his professorship at the University of Chicago to join Power at Harvard.

“She became the recent topic of gossip on legal blogs when word spread that Professor Sunstein had broken up with his companion of more than a decade, the philosopher and scholar Martha Nussbaum, and taken up with Ms. Power,” The New York Times reported in February 2008.

At their wedding, one of the Prayers of the Faithful called “for the victims of cruelty and injustice, for those who protect wildlife and animals and those who are poor and persecuted,” to be remembered.