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Scarlett Johansson is a Democrat. She donated $14,000 to the President Barack Obama's 2012 re-election campaign and also co-hosted a fashion-themed fundraiser for it with Vogue magazine Editor-in-Chief Anna Wintour in February. In 2008, she donated more than $2,000 to Obama and the two also corresponded via email. She has also expressed support for First Lady Michelle Obama's anti-childhood obesity program, via a public letter sent to a congressman.
She spoke at the Democratic National Convention on Sept. 6, 2012 (watch video)
(Pictured: Scarlett Johansson appears at the premiere of 'The Avengers' in Los Angeles on April 11, 2012.)