[BettyBoop]

NEW DOCTOR: I look like him, I think like him, same memories, same thoughts, same everything. Except I’ve only got one heart.
ROSE: Which means?
NEW DOCTOR: I’m part human. Specifically, the aging part. I’ll grow old and never regenerate. I’ve only got one life… Rose Tyler. I could spend it with you. If you want.
ROSE: You’ll grow - grow old… at the same time as me?
NEW DOCTOR: Together.