Madden and Richie
and Joel Madden greeted the arrival of their daughter with joy and thanks.
"We are very blessed she's healthy and beautiful and so good already," Madden told PEOPLE on Saturday. "We are very happy."
Richie, 26, and Madden, 28, welcomed 6-lb., 7-oz Harlow Winter Kate Madden
on Friday, the couple's rep at Handprint Entertainment says, and the Hollywood congratulations started flowing.
"It's just amazing. I'm so excited," Richie's friend, The Hills
star Lauren Conrad
, told PEOPLE while at the grand opening for Jimmy Choo's Flagship store in Beverly Hills. "I want to see the baby! I bet it's beautiful."
Additional reporting by JENNY SUNDEL