Better late than never!

"Good Girl" singer Carrie Underwood, 28, The Office alum Steve Carell, 49, and Smash star Debra Messing, 43, were the latest celebs to join Twitter this week. "I am in," Carell tweeted Thursday, while Underwood wrote, "Hello Twitter world!" Friday.

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Messing amassed nearly 12,000 followers since joining the social networking site Thursday. "I thought I'd enter the 21st century, but bear with me!" the actress wrote. "I'm a newbie!"

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The famous redhead -- currently dating her NBC costar Will Chase -- has already virtually connected with her former Will & Grace costars Eric McCormack and Sean Hayes. "When do I get to smooch that face in person?" Messing asked McCormack, 48. "Can't wait to hear about your play!"

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Fans can follow the stars at @CarrieUnderwood, @SteveCarell and @DebraMessing.

Tell Us: Which other celebs would you like to see join Twitter next?

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