Asthon Kutcher Asthon Kutcher

Ashton Kutcher beat CNN in the race to amass one million Twitter followers, but he may soon be eclipsed by Oprah Winfrey.

The talk show hostess sent her first tweet during Friday's taping of her show — with the help of Kutcher and Twitter CEO Evan Williams — a day after starting her own account. She had accrued more than 70,000 followers — before she tweeted anything. (You can follow on Twitter, too!)

"HI TWITTERS . THANK YOU FOR A WARM WELCOME. FEELING REALLY 21st CENTURY," Winfrey first tweeted at 10:13 am/ET.

She followed 10 minutes later with a request: "hi jimmy order a reuben for me."

Kutcher, who tweeted that he's going to "stay live on twitter" during his Oprah interview, hosted a live-stream countdown to the historic micro-blogging moment he hit one million followers, which occurred at 2:13 am/ET Friday. "Victory is ours!!!!!!!!" he tweeted.

The former That 70's Show star challenged CNN to the online brawl ("It's the web versus the world.") earlier this week when he noticed the two accounts had approximately the same amount of followers.

Kutcher said he would donate 10,000 mosquito nets to stop the spread of Malaria if he won. Sure enough, he made good on his promise as he wrote a check to the Malaria No More fund over the live stream.

CNN cruised over the one-million mark about 30 minutes after Kutcher did.

Who are your favorite celebrities to follow on Twitter?