The Future Is Female! See How Jennifer Lopez, Sarah Hyland & More Ladies Celebrated International Women's Day

The leading ladies of Hollywood are expressing themselves on social media to celebrate International Women's Day. Each year, the occasion is marked with a theme, and 2021 is all about accepting challenges.

"A challenged world is an alert world. Individually, we're all responsible for our own thoughts and actions — all day, every day. We can all choose to challenge and call out gender bias and inequality. We can all choose to seek out and celebrate women's achievements," the official website reads. "Collectively, we can all help create an inclusive world. From challenge comes change, so let's all choose to challenge."

Scroll down to see which of your favorite female stars are celebrating the day.