Showbiz
Rex Features
The Good Charlotte singer said the couple felt "blessed" to welcome Harlow Winter Kate Madden into their lives.
Richie gave birth to their first child at the Cedars Sinai Medical Centre in Los Angeles on Friday.
Madden wrote on his website: "I am finally home with my beautiful girlfriend and our brand new little daughter. She is 19 inches long and growing every day already! We are so blessed to have this beautiful little baby in our lives."
He revealed that the new arrival "looks so much like her mum, it's crazy", adding: "She eats like a little maniac and she's really sweet. She barely ever cries, even when daddy is changing her diaper, and believe me I suck when it comes to diapers, but I'm learning! I can't wait to show off some pictures."
The couple has asked well-wishers to make a donation to the Richie-Madden Children's Foundation, which aims to help disadvantaged children.
They are expected to tie the knot by the end of the year.
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