Actress Sophia Bush seen walking on the set of new TV pilot "Hartfelds and McCoys" in Boston, Massachusetts on March 18, 2013. Credit: Allan Bregg / Splash News

There's no denying Sophia Bush is a natural beauty! On Monday, March 18, the 30-year-old actress was photographed on the Boston set of her new NBC pilot, Hatfields & Mccoys. Wearing no makeup, the former One Tree Hill star looked fresh-faced and bright-eyed as she made her way to work.

Though she look just as flawless without the aid of mascara, the single actress has an obsession accentuating her eyelashes. "I have every brand under the sun," she admitted to Us Weekly in 2012. "I've got a jar of them in my bathroom and I love it!"

Bush's freshman CBS comedy Partners was canceled last year, and now the actress is hoping to return to the small screen this fall. "So yesterday I auditioned for Charlize Theron," she tweeted Feb. 28. "And today she hired me for [Hatfields & Mccoys]."

Produced by 37-year-old Theron, the series is set in present-day Pittsburgh and puts a new spin on the infamous ongoing feud between the two families. Written by John Glenn and directed by Michael Mayer, Hatfields & Mccoys also stars Rebecca De Mornay, Annie Ilonzeh, Jesse Lee Soffer, Nick Westrate and Patrick Flueger.

The pilot comes on the heels of History's Hatfields & McCoys miniseries, which aired in May 2012 and starred Kevin Costner and Bill Paxton. Shown in three installments, it became the network's most-watched broadcast of all time.