Miller has revealed her labour was "intense" but she felt more prepared after giving birth once before.

"It was so intense and the hardest thing I've ever done in my life. I felt very prepared for labour this time around... I had such an amazing support system at the hospital and my family, I felt totally taken care of," Miller told people.com.

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Expressing her joy, Miller, who tied the knot with Guess in 2006, added: "I feel so blessed and excited to see both my boys grow up together. My son Grayson is healthy and such a sweet baby. I was a little anxious as to when it would happen though.

"Having a toddler at home, you have more to organise to make sure everything is taken care of while you're gone at the hospital."