Former President Barack Obama practically brought the house down at Michelle Obama's book show in Washington.

Former First Lady Michelle Obama appears onstage at Becoming: An Intimate Conversation with Michelle Obama at the Capital One Arena in Washington, Saturday, Nov. 17, 2018. She was joined by Valerie Jarrett, a former senior advisor to President Barack Obama. (Photos: Polaris/Erin Scott)

The former first lady is currently touring the country promoting her memoir, "Becoming," and participated in a conversation Saturday night moderated by her longtime friend and former Obama White House adviser Valerie Jarrett.

When the conversation shifted toward Mrs. Obama's feelings about her husband, Jarrett announced a "special guest" and Barack Obama came on stage carrying a bouquet of pink roses for his wife.

The crowd at Capital One Arena leapt to its feet.

Jarrett asked him what about Michelle Obama captured his heart when they met at a Chicago law firm where she was his mentor.

Barack Obama said she was "one of a kind," strong and honest, and someone he knew he could always count on.

In this Oct. 31, 2016 file photo, President Barack Obama and the first lady Michelle Obama dance with kids to the beat of "Thriller" during a Halloween celebration at the South Portico of the White House in Washington. Former President Obama practically brought the house down at Michelle Obama's book show in Washington. (File photo: AP/Manuel Balce Ceneta)

He also said he knew that if she was the mother of his children their offspring would be "extraordinary."