The video was posted on the family's YouTube channel on January 31, 2021.
Ellie gushed, "He's so small!" And while carrying him, she said he smelled just like "baby powder."
As for Lilo, she was full of wonder figuring out who this new kid in the house was.
But she was all smiles as she lay beside her baby brother, with their dad Philmar Alipayo looking at them so pleased.
The island girl couldn't take away her eyes from Koa, touching him ever so gently.
"Little big sis"
Lilo quickly fell into the role of "little big sis," and Andi couldn't help but feel proud how naturally it came to her one-year-old daughter.
The actress wrote in her Instagram post: "She takes after Ellie! I am definitely looking forward to witnessing this siblingship and watching them grow together.
"But also just living in the moment for now, enjoying every second of her being a jolly little toddler who only continues to brighten up all our days. Oh my baby forever she will be."
Andi gave birth to Koa on January 17.