Capaldi was born in La Jolla, California, and currently resides in Carlsbad, California with her parents. She began acting with small roles in the Disney Channel Original Series ANT Farm and in the CBS's comedy How I Met Your Mother, as a 7-year-old Lily, who is played as an adult by Alyson Hannigan. In addition, Capaldi was featured in the pilot for The Goodwin Games. Capaldi also stars in Corbin Bernsen's independent film 3 Day Test". She currently stars in "Dog with a Blog" on Disney Channel as Chloe. The role marks the series regular debut for the young actress.