Musician and actress shared the happy news on their official Instagram accounts with the same post.
“Happy New Year from the Maddens! We are so happy, blessed and grateful to begin this new decade by announcing the birth of our daughter, Raddix Madden,” their note read. “She has instantly captured our hearts and completed our family.”
Diaz, 47, and Madden, 40, tied the knot in 2015.