"I'm so happy after such a long struggle to be living my true self," Jenner says

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Caitlyn Jenner is already a social-media star.

Just four hours after her first Tweet, the Olympian boasts more than 1 million followers on Twitter, breaking a record previously held by President Barack Obama, according to Variety.

“I’m so happy after such a long struggle to be living my true self,” her bio and first Tweet read. “Welcome to the world Caitlyn. Can’t wait for you to get to know her/me.”

“Caitlyn Jenner” is trending on Twitter, and she also has an official Facebook page with more than 130,000 likes and Instagram account with nearly 160,000 followers.

Jenner Tweeted a follow-up on Thursday night, writing, “Another Jenner world record, and at 65? Who da thought! Humbled & honored to have reached 1M followers in 4 hrs. Thank you for your support.”

Formerly known as Bruce, Jenner, 65, revealed her first photo as a woman on the cover of Vanity Fair on Monday.

Daughters Kylie and Kendall Jenner and stepdaughters Kim, Kourtney and Khloé Kardashian have voiced their support online, too.

The Vanity Fair issue hits newsstands June 9.