Michelle Obama Michelle LeVaughn Robinson ObamaBlack stars reimagine 'Friends' to get out the vote Obama shares phone number to find out how Americans are planning to vote Michelle Obama: 'Don't listen to people who will say that somehow voting is rigged' MORE says she's "thrilled" by the new arrival for Prince Harry and Meghan, the Duchess of Sussex. The royal couple welcomed a baby boy on Monday, Buckingham Palace announced.

After the news broke that the American-born duchess had given birth, the former first lady tweeted her congrats:

Congratulations, Meghan and Harry! Barack and I are so thrilled for both of you and can't wait to meet him. #RoyalBaby https://t.co/mfE7uc6ooV — Michelle Obama (@MichelleObama) May 6, 2019

The baby is now seventh in line to the British throne.

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"This little thing is just absolutely to die for, so I'm just over the moon," Prince Harry said in remarks to reporters shortly after his son's birth.

The Obamas have forged a seemingly close relationship with the 34-year-old British prince over the years. In 2017, Harry interviewed Obama as part of a guest editor stint for BBC Radio 4.

He also visited Chicago that year for the Obama Foundation's inaugural summit.

Obama wasn't the only U.S. political figure to offer good wishes to the new addition. Rep. Seth Moulton Seth MoultonThe Hill's Morning Report - Presented by Facebook - Markey defeats Kennedy; Trump lauds America's enforcers in Wisconsin Moulton fends off primary challenges in Massachusetts Portland: The Pentagon should step up or pipe down MORE (D-Mass.), a 2020 presidential candidate who welcomed a daughter last October, gave a shout-out to Harry for becoming a father: