The 36-year-old actress and the 69-year-old star attended the 2015 Glamour Women of the Year Awards, where Hudson was honored with the Entrepreneur of the Year award for new sportswear brand Fabletics.
Hudson turned heads in a shimmering J. Mendel gown with a plunging neckline and hand-pleated skirt, while Hawn showed off some skin in a sleeveless black dress with monochrome pattern.
Hudson later shared a video of their family after-party, where she flashed her legs and behind for the camera. Hawn can be heard saying, "Honey, the dress has to do that. Unfortunately there was no wind machine."
Hudson last appeared in Good People with James Franco, and is scheduled for Rock the Kasbah with Bruce Willis and Deepwater Horizon with Mark Wahlberg. Hawn recently told Porter magazine her longtime relationship with Kurt Russell doesn't require marriage to be successful.