Mackenzie Davis: Tully
Tully : I'm here to take care of you.
Marlo : I thought you were taking care of the baby.
Tully : Yeah, but you pretty much are the baby. I mean, even though this one's been earth-side for three weeks, her DNA is still inside of you.
Marlo : [chuckles] Right, yeah.
Tully : No, actually her cells will hang around in your bloodstream for years, and though Mia here will be her own person someday, right now she's still very much an extension of you. She knows your smell, your voice, your heartbeat. And you know her better than anyone. I mean, you built her from the toes up.