She announced she was pregnant for the third time on Halloween. And Grey's Anatomy star Caterina Scorsone revealed on Tuesday that her bundle of joy had arrived just in time for the new year. 

The 38-year-old beauty took to Instagram to share the happy news with her 2.2 million followers, revealing she'd welcomed another daughter and named her, Arwen Giles. 

'Arwen is here! Our family wishes you a happy new year, a happy new decade and a happy heart made new by love in every exquisite moment.

❤️' she captioned.  Caterina shared two photos, one with each of her daughters hugging their new sister

The first picture had Eliza, seven, in a green and white dress with her eyes closed as she laid down beside Arwen.   The other photo had Paloma, three, blow her baby sister a kiss from above.