On Wednesday, U.S. Treasury Secretary Jack Lew said a woman will be featured on a redesigned $10 bill in 2020 - the 100th anniversary of the Constitution's 19th Amendment, which gave women the right to vote. A decision on who the woman will be won't be made for several months. The last woman on U.S. paper currency was Martha Washington, who was on the $1 Silver Certificate between 1891 and 1896. We have only made changes to the faces on our currency a few times since bills were first put into circulation, and I'm proud that the new 10 will be the first bill in more than a century to feature the portrait of a woman," Lew said. The department will launch a website, and is asking for input over social media with the hashtag #TheNew10. Lew wants the next generation of U.S. currency to underscore the theme of American democracy. The portrait must also be of someone who is no longer living. Hamilton, who was the nation's first treasury secretary, has been on the $10 bill since 1929. Bills are flagged for updates mainly for security reasons, Lew said. It was a "happy coincidence" that a push to put a woman on American money happened as the $10 note came under consideration. Lew said Hamilton will also be a part of the new design. He said it's up for discussion whether Hamilton will appear alongside a woman or be the centerpiece of one version of the new bill.