Mr. Colbert lured the former president to the social networking site on "The Colbert Report" on Monday, signing him up with the handle PrezBillyJeff. President Clinton dictated his first message to Colbert, who typed: "Just spent an amazing time with Colbert! Is he sane? He is cool!"
Whether Mr. Clinton would continue to use the account is uncertain.
Colbert's hand is clearly in the account's bio, too. It reads: "Stephen Colbert is my BFF."
By Tuesday morning, the account had amassed nearly 50,000 followers and was climbing fast.