Harriet Tubman will boot Andrew Jackson from the face of the $20. She'll become the first black woman ever to front a U.S. banknote. Tubman, who died in 1913 at the age of 91, escaped slavery in the south and eventually led hundreds of escaped slaves to freedom as a conductor" of the Underground Railroad. After the slaves were freed, Tubman was a staunch supporter of a woman's right to vote. "What she did to free people on an individual basis and what she did afterward," [Treasury Secretary Jack] Lew said. "That's a legacy of what an individual can do in a democracy." The $5 bill will keep Abraham Lincoln, the 16th president, on the front. The back of the bill will depict the Lincoln Memorial along with portraits of individuals involved in historic events that took place there. That includes Marian Anderson and Eleanor Roosevelt. The African-American opera singer and former first lady held a concert at the memorial in 1939 in an effort to move the civil rights movement forward. Martin Luther King Jr. will be added the back of the bill. The Lincoln Memorial was the site of his famous "I Have a Dream" speech in 1963. It's not clear when the $20 or $5 will enter circulation. Updating currency can take more than a decade.