Justin Thomas Girlfriend Jillian Wisniewski Wiki Biography Age Bio Details –Jillian Wisniewski is the girlfriend of American golfer Justin Thomas. She has taken a place in the hearts of viewers with her beautiful smile. She was a reporter and co-anchor of the school’s news network, as well as a representative of the student service center. She came into prominence when she was caught kissing Justin behind the 18th green. She was present at the PGA Championship game, supporting her beau.