Twitter has undergone a rebranding and is now known as 'X,' with a new logo featuring an X replacing the iconic bird.Elon Musk, along with Twitter CEO Linda Yaccarino, led the logo change, and Musk crowdsourced the new design, implementing it within hours.The new X logo has been unveiled on Twitter's official account, but it's not yet reflected in X's user interface.Musk replaced his profile picture with the X logo and shared a link leading to the Twitter homepage via X.com.