Michael Bublé chose a surprising person as the first to hear that his wife is legally pregnant.

Michael says that Legally Blonde star Reese Witherspoon was actually the first person he told that he and wife Luisana Lopilato are expecting a baby, according to Parade.

So why did he tell Reese before he had even told his family? 

It turns out that, just after he got the happy news about his upcoming little one, he and Reese happened to be on the phone to discuss their duet of Frank Sinatra's "Something Stupid."

"I had just found out [my wife was pregnant]," the 37-year-old crooner explains. "It was the greatest day of my life, so I just said, 'You know, I’m having a baby!'"

"And Reese was so sweet about it and excited for me," he continues. "It was nice for us to bond that way."

"I told her before anyone else in the world knew, even members of my own family!" Michael points out.

Michael, who was a mentor on The Voice last season, has recently revealed that he and 25-year-old Luisana are expecting a boy.

Reese herself became a mother for the third time when see welcomed Tennessee in September.

We're sure Reese was honored to receive such special news!

Source: Parade