updated 06/08/2011 AT 11:00 AM ET
•originally published 06/08/2011 AT 11:35 AM ET
Talk about precious cargo!
In the first photos snapped of the newborn, Hart, 35, totes 5-day-old Willow in a brown baby carrier as the new mom, dressed in workout gear, leads the way on their hike.
“We are ecstatic to welcome our new beautiful healthy happy baby girl,” the singer, 31, Tweeted Thursday, the day Willow was born. “She’s gorgeous, just like her daddy.”