Emeline later died at an Orange County Hospital, the day after paramedics tried unsuccessfully to revive her.
"We are beyond devastated," Miller said in an Instagram post that showed several photos of the blonde, blue-eyed, chubby-cheeked toddler.
"Never in a million years did we think we would experience a pain like this," Miller said in the post. "Her love, her light, her spirit will never be forgotten. Our little girl loved life and lived it to its fullest every day."
Miller, who has three other children, went on to ask for privacy later in the Instagram post.