Washington, Apr 18 : After Ashton Kutcher's record-breaking debut on Twitter, the social networking world has now welcomed yet another celebrity entrant - Oprah Winfrey.

Around 10 a. m. on April 17, the talk-show queen posted her first Twitter message, entirely in caps.

"HI TWITTERS . THANK YOU FOR A WARM WELCOME. FEELING REALLY 21st CENTURY," Us magazine quoted her as writing on Twitter.

With 75,000 followers so far, Winfrey has added Demi Moore and Jimmy Fallon in her friend list.

Fallon even "tweeted" to tell her that he was at a deli for a photo shoot.

And she replied: "Hi Jimmy. Order a reuben for me."

Oprah also posted an update on her newly adopted blond cocker spaniel Sadie, who is suffering from a gastrointestinal tract disease.

"Sadie''s great. Gets her rabies vaccine today," said Winfrey. (ANI)