Naturalists at the reserve noticed the first owlet in a nest last week. It's believed the second owlet hatched a few days after the first.
FOX 11 viewer Tim Sweet shared photos with us.
According to the Audubon Society, great horned owls typically lay two or three eggs at a time, though the number can range from one to, in rare cases, as many as six.
Andrea Bierbrauer, a naturalist at Heckrodt, says it appears the owl laid two eggs, since any more would have hatched by now.
The great horned owl and its young have been popular with other wildlife photographers, who have shared photos with us. The young birds are becoming more visible as they grow, Bierbrauer says.
The owlets are at the age where they are being given small bits of food such as rabbits and squirrels. They are also learning how to pick off pieces on their own. It is possible visitors may catch a glimpse of the owlets being fed.
Bierbrauer expects the owlets to start learning to fly in mid- to late April, making short flights between tree branches.
Staff members at Heckrodt recommend that if you visit and see the owls that you respect their space and not get too close to the birds. They also recommend you bring binoculars or a camera with a zoom lens to get a better view of the owlets.
If you're able to take photos of the owls, share them with us here: