Harper Murtaugh is the second daughter and youngest child of Trish and Roger Murtaugh.
She is played by twins Madison & Mikayla in Lethal Weapon.
Biography
Harper was born in late 2015, somewhere around the same time her daddy, Roger, had a "minor" heart attack in the waiting room; making her about a year and a half old. She has an older brother named Roger "RJ" and an older sister named Riana.