Linking arms with her co-star to help ward off the cold, Sophia Bush filmed scenes for "Hatfields & McCoys" in Boston on Tuesday (March 26).

The "One Tree Hill" star was bundled up in a turtleneck, brown coat, and red overcoat as she chatted with castmate Nick Westrate.

On Tuesday, the 30-year-old star took to Twitter to support marriage equality on the day the Supreme Court heard oral arguments in two different same-sex marriage cases.

Hopeful about the outcome, Sophia tweeted, "I believe that @SCOTUS will intervene today, and help us all be on the right side of history. We must be the change."