Millie Bobby Brown, 17, gets Pfizer COVID-19 vaccine

Millie Bobby Brown and several of her Stranger Things castmates spent their Easter getting vaccinated.

On Sunday, the 17-year-old actress shared a photo of herself, to her Instagram Stories, receiving her Pfizer-BioNTech COVID-19 vaccine while filming in Georgia; she added a "Let's get vaccinated" sticker, encouraging her over 44 million followers to do the same.

Castmates Noah Schnapp and Gaten Matarazzo also shared photos showing their own vaccine moments.

"Happy Easter Everyone Get vaccinated," Matarazzo captioned a Sunday post to his Instagram.

Just last month, Georgia began expanding vaccines to residents 16 years old and up. The state is gearing up for the increase in patients at various vaccination sites.

So far, the Moderna and Johnson & Johnson vaccines have not been approved for recipients under the age of 18, but teens 16 and older are able to get the Pfizer vaccine, which the American Academy of Pediatrics calls "extremely effective" among adolescents. A clinical trial among patients between the ages of 12 to 15 showed no signs of building symptomatic infections while also building strong anti-bodies.

Brown is far from the first celebrity to share her COVID-19 vaccination experience; others have included Samuel Jackson, Ryan Reynolds, Sarah Michelle Gellar, Michelle Obama and more.

“When you can get the COVID-19 vaccine, I hope you do — Barack and I are certainly glad we did,” Obama captioned a social media post. “It’s our best shot at beating this virus, looking out for one another, and getting back to some of the things we miss. Getting vaccinated will save lives — and that life could be yours.”

As of late March, 20 states, including Ohio, Wyoming and Maryland, began offering vaccines for residents 16 years and older and, early this week, 18 more states are expected to follow suit. It is expected that all 50 states will expand vaccinations to this demographic by May 1.

Read more from Yahoo Life

• Millie Bobby Brown, 17, says fans can't accept the fact that she's growing up: 'Let me wear a high heel!'

• CDC updates travel guidance for fully vaccinated people. Here's what experts say it means for families, summer vacations

• COVID-19 'breakthrough cases' are 'extremely unlikely,' experts say

Want lifestyle and wellness news delivered to your inbox? Sign up here for Yahoo Life’s newsletter.