On what would have been Betty White's 100th birthday today, fans of the actress are donating to animal shelters in droves as part of the hashtag campaign "Betty White Challenge."

On the eve of her passing, Twitter user Lisa Powell suggested that on January 17th, fans should donate money to a local animal shelter in honor of the late celebrity. White was a famous lover of animals throughout her lifetime and worked with the American Humane organization for more than 60 years.

Let’s all donate something to your local animal shelter on Betty’s birthday on January 17th in her honor! It’s the least we can do to still celebrate & honor Betty’s love of animals!! #RIPBetty #BettyWhite #ripbettywhite #BettyWhiteChallenge #BettyWhiteDay https://t.co/R6JqdFI8hF

— Lisa Powell (@icedcoffees) December 31, 2021

It's unclear if Powell's tweet inspired the birth of the #BettyWhiteChallenge, but the idea soon lead a flood of social media users to announce their participation by donating to animal shelters across the United States.

I'm going to participate in the #BettyWhiteChallenge by donating to @AmericanHumane.

For every 50 likes this tweet gets, I'll donate an additional $5, up to a maximum total gift of $50.#GoldenGirls#BettyWhite pic.twitter.com/aaxxrp7xD5

— Golden Girls Quotes (@GoldenGirls85) January 5, 2022

#BettyWhiteChallenge
Spread the word! ❤️ pic.twitter.com/vbbffIkw8Z

— That Megan 🕊🥳 (@motalley) January 16, 2022

Today is a great day to make a donation to your favorite animal shelter or rescue organization. #BettyWhiteChallenge https://t.co/FS3gAtMB0U

— I've Pet That Dog (@IvePetThatDog) January 17, 2022

Today would have been this wonderful woman's 100th Birthday. Happy Birthday #bettywhite. Today take the #BettyWhiteChallenge & donate to your local animal shelter in her name today or buy any of our Charity Drive shirts featuring an animal & we'll donate to an accredited shelter pic.twitter.com/IywqMHmlUA

— WholesomeMemes (@WholesomeMeme) January 17, 2022

Betty White was an animal advocate all her life. If all of Betty's fans donated just $3.00 to an animal rescue, imagine how many animals would be saved in honor of Betty White.#BettyWhiteRIP #BettyWhiteChallenge #bettywhiteforever #2021toastBettyWhite#animals#DonateforBetty pic.twitter.com/tJemRn4dtd

— It's a dog life (@almadanks) January 1, 2022

It remains to be seen how impactful the #BettyWhiteChallenge will be for animal shelters across the country, though it looks like it will be a boon.

“I’ve had many conversations with Betty about animal welfare, and I know she’s looking down from heaven and really smiling,” American Humane leader Robin Ganzert said about the internet challenge. "She’ll be smiling on her birthday, and she’ll be smiling about the lives she’s changed."