Hilary Duff announced on Instagram Monday that she has given birth to a daughter.

"Banks Violet Bair [heart emoji] this little bit has fully stolen our hearts! She joined our world at home on Thursday afternoon and is absolute magic," the "Younger" and "Lizzie McGuire" actress captioned a photo of her standing by a window and smiling down at the blanket-swaddled newborn she is holding.

Her boyfriend Matthew Koma is behind them in the snapshot.

Duff first revealed she was pregnant with her second child in June.

She also has a 6-year-old son named Luca with her ex-husband, Mike Comrie.

Photo credit: Hilary Duff/Instagram