Twitter has appointed longtime American Express executive Leslie Berland as its Chief Marketing Officer. Twitter’s Chief Executive Officer Jack Dorsey announced this through a tweet a short while ago.

Welcoming @leslieberland to Twitter! She will join as our CMO to help tell the stories of our iconic product!

— Jack (@jack) January 26, 2016

Berland was earlier Vice President of global advertising, marketing and digital partnerships at American Express.

Thanks @Jack! Excited to join you and the amazing teams to bring to life the power, uniqueness and magic of Twitter! https://t.co/cjlVcCtMjs

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— Leslie Berland (@leslieberland) January 26, 2016

Recode.net reported “Twitter’s product is well-known globally, with more than 300 million users and tons of media and brand partnerships.”