"I got together with some friends for the Democratic National Convention. We believe in Hillary Clinton. We love the sound of the first woman president!" Banks captioned the video.
The DNC has also featured several celebrity appearances. On Tuesday night, Meryl Streep delivered a speech about Clinton, as did Lena Dunham and Ferrera.
"Tonight ... you people have made history, and you're gonna make history again in November. Because Hillary Clinton will be our first woman president and she will be a great president, and she will be the first in a long line of women and men who serve with grit and grace," Streep said to applause. "She'll be the first but she won' be the last!"