The 40-year-old "Burnin' It Down" hitmaker shared the happy news on Instagram.
"Been hard to keep this secret but we couldn't be happier to add to our family. This year just gets better and better. #bunintheoven," he captioned the photo of him and his wife sitting in the kitchen.
Kerr also confirmed the news on social media while posing in front of blue and pink balloons.
"SURPRISE!!! WE ARE PREGNANT!!! This was the hardest secret we've ever had to keep. This journey for us has been full of many happy times and also many tears... The biggest rollercoaster we have ever been on, without a doubt," she wrote.
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