Alex Mullen (born March 3, 1992) is an American memory grandmaster, physician, and three-time world memory champion.
The first American to win the world title, he won for three consecutive years the 2015, 2016, and 2017 World Memory Championships and is currently the world No.
1 ranked memory competitor.
He is also the 2016 USA memory champion.
Along with his wife, Princeton alumna Cathy Chen, he runs Mullen Memory - a nonprofit which "provides free resources exploring memory palaces as learning tools."