As of 2019, who is the youngest person to have won an Emmy, a Grammy, an Oscar, and a Tony Award?

Robert Lopez is an American songwriter of musicals, best known for co-creating "The Book of Mormon" and "Avenue Q", and for composing the songs featured in the 3D Disney computer animated films "Frozen" (and its sequel, "Frozen II") and "Coco", with his wife Kristen Anderson-Lopez. Of only fifteen people who have won an Emmy, a Grammy, an Oscar and a Tony Award, he is the youngest and quickest (10 years) to win all four, and, as of 2018, is the only person to have won all four awards more than once.

Lopez won Oscar's for Best Original Song for "Let It Go" in 2014 and "Remember Me" in 2018. He won Grammy's for Best Musical Theater Album for "The Book of Mormon" in 2012, Best Compilation Soundtrack for Visual Media for "Frozen" in 2015 and Best Song Written for Visual Media for "Let It Go" in 2015. He won Emmy Award's for Outstanding Music Direction and Composition for "The Wonder Pets" in 2008 and 2010. He also won Tony Awards for Best Original Score for "Avenue Q" in 2004, Best Book of a Musical and Best Original Score for "The Book of Mormon" in 2011.