The 42-year-old actor was joined at the event by his wife Eve Mavrakis.
Ewan hit the stage during the show to present an award alongside two-time Oscar nominee Viola Davis. He was also there to support his August: Osage County co-stars Julia Roberts and Meryl Streep, who were nominated for their work in the movie.
FYI: Eve is wearing a Marni black dress in wrinkled cotton and silk, as well as a Marni VIP Capsule glass stone and sequined embroidered vinyl bra. Ewan is wearing a Neil Barrett tuxedo from the AW14 Menswear Collection.