Maggie Gyllenhaal & Mark Ruffalo: Riverkeeper Fisherman's Ball!

Maggie Gyllenhaal keeps it chic while attending the 2013 Riverkeeper Fishermen`s Ball held at Pier Sixty at Chelsea Piers on Tuesday (April 16) in New York City.

The 35-year-old actress was joined by Mark Ruffalo, who was honored at the event.

PHOTOS: Check out the latest pics of Maggie Gyllenhaal

Earlier in the day, Maggie was spotted looking casual and cute while out and about in the Big Apple.

“I think the way he [Peter Sarsgaard] feels about me really does not have a lot to do with my hair and I’m really incredibly grateful for that,” Maggie recently shared.

15+ pictures inside of Maggie Gyllenhaal and Mark Ruffalo attending the 2013 Riverkeeper Fishermen`s Ball…