Following months of speculation, Hillary Rodham Clinton has confirmed she's running for president of the United States in 2016.

John Podesta, a top adviser for Clinton, sent out an email Sunday about the former first lady's decision to run for president.

"I wanted to make sure you heard it first from me -- it's official: Hillary's running for president," said Podesta. "She is hitting the road to Iowa to start talking directly with voters."

According to Podesta, a formal kickoff event will happen in May.

Clinton released a YouTube video Sunday (April 12) to confirm her decision to run. In the video, several people discuss their plans for the future, including a mother looking to reenter the working force after five years of raising her children, two brothers opening their first business and a gay couple planning a wedding.

"I'm getting ready to do something, too," Clinton says in the clip. "I'm running for president."

Clinton goes on to discuss how Americans are still fighting back in tough economic times, but that "the deck is still stacked in favor of those at the top."

If elected in 2016, Clinton would be the first female president of the United States.

You can watch Clinton's presidential announcement video "Getting Started" below.