The first eaglet hatched Friday in the nest in the Hays section of Pittsburgh, near the Monongahela River.
The second eaglet hatched Monday and the third Thursday.
All three hatchings were witnessed by viewers worldwide via a 24-hour live video feed of the nest on PixController.com.
“Amazing how people are into this,” PixController President Bill Powers said. “Pittsburgh is getting a worldwide audience, too. So great for the city.”