"Raising a kind, curious, light-hearted, sister respecting, sister protecting, boy," the actress lovingly captions the photo.
Nico is following in her mother's footsteps by pursuing a career in acting. Her first big role is playing Milly Farrier in the live-action remake of Dumbo.
The Westworld star affectionately calls her two daughters Ripley and Nico her little "slices of home."
Ripley cuts a striking figure alongside her mother at the EE British Academy Film Awards.
Nico steals the show in a Carolina Herrera gown at the Dumbo premiere, with an equally stunning mom.
Ripley, Ol and Thandie don their black tie ensembles to see Nico make her big screen acting debut in the Disney film, Dumbo.
The resemblance between the 14-year-old and her 46-year-old mother is uncanny.
Talent clearly runs in the family. Thandie's husband, Ol Parker, wrote, directed and produced Mamma Mia! Here We Go Again.
Nico, Thandie and Ol flash their pearly whites for the cameras on a fun day out.