Naomi Campbell has agreed to sign a 'No Phone Throwing' pledge.

After an appearance on The Oprah Winfrey Show, the supermodel signed the chatshow hosts 'No Phone Zone' pledge that requires guests to not use their cellphones while driving in order to avoid accidents, but Oprah wanted an additional pledge from her.

"I think I'm going to ask you to sign a no phone throwing pledge," said Winfrey, to which Campbell replied: "I'll sign it."

The pledge was a reference to an incident that saw the model throw a cellphone at a staff member.

"I'm trying to be a better person, I'm trying to improve my behaviour and live in peace," she said in tears about the altercation.