Ellen Pompeo has become a mother for the second time.

The 'Grey's Anatomy' actress announced via her WhoSay account Thursday that she and husband Chris Ivery - with who she already has five-year-old daughter Stella - had welcomed baby Sienna into the world via a surrogate, though it is unclear when the little girl was born.

She wrote alongside a photo of her husband kissing the baby:

"Sienna May Ivery welcome to the world. We love you more than words can say."

She later added on Twitter: "Sienna was born via surrogate & I would like to thank my whole @ShondalandTV family for helping us enjoy these first few weeks privately [love] U.(sic)"

The 44-year-old actress recently admitted she was considering quitting acting when she finally decides to depart her 'Grey's Anatomy' role of Meredith Grey - who she has played since 2005 - as she has no "strong desire" to find new roles.

She said: "I definitely feel myself transitioning. I don't find acting terribly empowering. For the place I am in my life, I think my age, once I hit 40, I feel differently. I don't necessarily want to work for other people."

However, the Golden Globe winner - who has starred as Meredith Grey on the medical drama since 2005 - refused to confirm that she would be quitting acting for good.

When asked if the end of 'Grey's Anatomy' could mark the end of her acting career, she said: "Oh, absolutely. I mean, never say never, I'm not going to come out and make one of those statements like, 'I'm retiring after...' and then in February come back. I try to keep an open heart, an open mind, an open soul and spirit to whatever comes my way and whatever is meant to be for me will be."