The actor's mother Gloria has been accompanying him to major award shows but Cooper, who has been dating the British model for nearly a year, decided to introduce Suki to Hollywood's award season, reported People magazine.
Suki, 22, was first spotted with Cooper in March last year while the 39-year-old actor was filming in Boston.
After that the couple has been spotted together in Paris and other places but it was for the first time Cooper brought her to a major award show this year.