The 40-year-old singer popped the question to Emily, 23, in their child's nursery, reported Daily Mirror.
"It was such a shock. He always said he'd like to do it before the baby was born and I just thought he'd do it after - I was happy, I didn't need a ring, but it was amazing," Emily said during an interview with a magazine.
Speaking about the moment he popped the question, Andre said, "She said, 'Are you serious?' and burst into tears - it was so emotional. We lay down in the nursery for ages because it was such a special room to us."
The diamond band took six weeks to complete.