Sienna Miller: Vanity Fair Party at Tribeca Film Fest!

Sienna Miller keeps it sophisticated while attending the Vanity Fair Party during the 2013 Tribeca Film Festival held at the State Supreme Courthouse on Tuesday (April 16) in New York City.

The day before, the 27-year-old actress was seen holding hands with her fiance Tom Sturridge while taking a stroll in the West Village.

PHOTOS: Check out the latest pics of Sienna Miller

On the same day, Tom promoted his new Broadway show Orphans with his co-stars Alec Baldwin and Ben Foster on TimesTalks.

Ophans is currently in previews and will open on Thursday, April 18 at the Schoenfeld Theatre. Buy tickets now!

FYI: Sienna is carrying a Delvaux Madame bag at the party.

20+ pictures inside of Sienna Miller attending the Vanity Fair Party…