They may seem like an unlikely pair, but Michelle Obama and former President George W. Bush have a warm, genuine friendship with one another.

George W. Bush smiles as he speaks with Michelle Obama during an event marking the 50th Anniversary of the Selma to Montgomery civil rights marches at the Edmund Pettus Bridge in Selma, Alabama, March 7, 2015.

“That surprised everybody,” Bush told Ellen DeGeneres on a recent episode of “Ellen.” “That’s what so weird about society today. People on opposite sides of the political spectrum could actually like each other.”

Bush and his wife, Laura, wait to pay their respects with Obama and California Governor, Jerry Brown, during the funeral for former first lady Nancy Reagan in March 2016.

Yet, the reason why the two get along so well is pretty simple: Bush makes Obama laugh.

“She kind of likes my sense of humor. Anybody who likes my sense of humor, I immediately like,” Bush told People while promoting his new book, “