Troian Bellisario may have been at Sundance for her new film C.O.G. but the Pretty Little Liars star also used the work trip as a chance for quality time with actor boyfriend Patrick J. Adams.
"You can tell she is totally in love and so is he," an onlooker tells PEOPLE of the happy couple, who were holding hands at the TR Suites Lipton Lounge Sunday. "They sort of finish each other's sentences."
The festival date nights for Bellisario and Suits star Adams started on Saturday with an intimate dinner at PAX Sundance where they played shuffleboard and Word With Friends. After dinner the couple got social and danced the night away at TAO Nightclub at Village at the Lift.
"They looked super cute and happy together! It looked like they were having a really good time," says one TAO partier.
Their snowy vacation continued Sunday with Adams waiting patiently as Bellisario got her hair done at the Dove Color Care Salon.
"He stopped in at the front of the Suites and said 'I'm meeting my girlfriend,'" an onlooker says. "He was very good natured and quiet – he didn't want to interrupt her while getting her hair done."
Later that evening, the freshly coiffed Bellisaro and Adams headed to the GLAAD premiere party for her film C.O.G., based on the writings of David Sedaris.
– Patrick Gomez