This depends on how you are connected to the game.
If you're playing connected to a King account, then simply follow these steps:
- Open the game on your device and tap the Settings button (usually shaped as a cog).
- Tap the orange and yellow King account icon.
- If you're already logged into your account then choose the option 'Edit profile' - now change your player name and profile picture and you're all set!
If you are saving your game with Facebook, your Facebook profile name and picture will show in the game. If you'd like to change these simply log into your own Facebook account, make the changes and you're good to go! Please note that the changes may take a few hours to be pushed into your game profile.