Scott Disick is mourning the sudden loss of his mother.
Bonnie Disick has died at the age of 63, E! News confirmed Thursday. She and husband Jeff lived on Long Island, N.Y., where Scott, an only child, was raised.
Scott and Kourtney Kardashian have been in New York since last week.
Bonnie and Jeff Disick were featured on a 2011 episode of Kourtney & Kim Take New York when Kourtney took little Mason to visit his paternal grandparents in the Hamptons, with sister Khloé Kardashian Odom along for the ride.