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Jenna Bush Hager expecting second child in August

Jenna Bush Hager attends the 2014 GQ Gentlemen's Ball at IAC HQ on Oct. 22, 2014, in New York.

Dimitrios Kambouris/Getty Images for GQ

Jenna Bush Hager is pregnant with her second child.

The twin daughter of former President George W. Bush and former first lady Laura Bush says she expects to give birth in August. She made the announcement Monday on NBC's "Today" show, where she is a contributing correspondent.

Her 2-year-old daughter, Mila, is reportedly excited about the news. Hager told her "Today" show colleagues that Mila has been saying, "Baby sissy, baby sissy."

The "Today" crew presented her with a tiny T-shirt that said, "Baby sister."

Hager, 33, is married to Henry Hager. In an interview with People, Hager revealed she and her husband will be welcoming a second daughter.

"We started talking [to Mila] about it," she added. "And she'll say, 'Hi baby!' to my stomach. She is very precocious. I think she'll be a great big sister but there may be a learning curve. She definitely likes attention!"