The actress shared the news in an Instagram post on Tuesday.
The Shameless actress took to Instagram on Tuesday to announce that she'd given birth the day before, in a post that included a slideshow of touching snapshots.
"5.24.21 On a sunny Monday morning, at 8:13AM, we welcomed our daughter into the world," Rossum captioned the post.
The cover photo in the post showed Rossum displaying her baby bump, followed by a sweet, smiling snapshot of herself and Esmail, and finally an ink print of their newborn's footprint.
Rossum, 34, shared a follow-up post that featured a striking black-and-white photo of the actress standing next to a bay window while bearing her baby bump.
She captioned the post, "Two weeks before our daughter was born."
Congrats to the happy couple!