Nicole Ritchie and DJ AM engagement party

Nicole Richie, in vintage Halston, and fiancé Adam "DJ A.M." Goldstein celebrate with her parents, Brenda and Lionel Richie, at their engagement party on Thursday. The bash was held at Lionel Richie's Beverly Hills home; guests included Lindsay Lohan, Nicky Hilton, Mischa Barton and Barton's ex, Brandon Davis.