Actress Scarlett Johansson has joined some of the biggest names in design and Hollywood to throw her weight behind US President Barack Obama.

Johansson alongwith the likes of Anna Wintour, Georgina Chapman and Diane Von Furstenberg launched the new Runway to Win line of Obama-themed clothing and accessories in New York City on Tuesday night.

Sales of the celebrity-designed line will benefit the president's re-election campaign. Touting Obama's record over his first three years in office, Johansson rattled off a list of advancements made since his inauguration in 2009, reported Huffington Post.

"Change for American women: the first bill President Obama signed into law was the Fair Pay Act. Three women now sit on the Supreme Court for the first time in history. And insurance companies must now offer women cancer screenings and contraception at no cost," Johansson said.

"Change for LGBT Americans: The President ended Don't Ask, Don't Tell so no one will ever again have to lie about who they love to serve the country they love. The President declared the Defense of Marriage Act unconstitutional. And he signed the Hate Crimes Prevention Act into law," she added. The 27-year-old pitched patience with Obama's approach to reviving the economy.

"...Obama inherited a turkey, he really did, and he's working to... he's fighting a kind of uphill battle in a sense and he has these past four years. And he never ran his first term as that -- he was always going to be a two-term election in that sense. And change doesn't happen overnight, you know, we know that."