Shailene Woodley dating co-star

A secret romance is blossoming between SHAILENE WOODLEY and her WHITE BIRD IN A BLIZZARD co-star SHILOH FERNANDEZ.

The stars play love interests in the upcoming thriller, and they sparked rumors of a real-life romance after kissing openly at the 2013 Sundance Film Festival in Park City, Utah, earlier this month (18Jan13).

Woodley was seen sharing kisses with Fernandez as they partied the night away at the Hyde Lounge.

A source tells Us Weekly, "They danced until 2am and ended up making out at the end of the night."

Fernandez previously enjoyed a romance with Juno Temple, who also went public with her new love at Sundance: she's dating Kristen Stewart's ex-boyfriend Michael Angarano.