The 22-year-old singer, who sparked rumours of dating the actor, took to Instagram to share a selfie with him.
"I (Love) Madrid... And this guy," she wrote.
Rumors began swirling around the pair when Trainor posted another Instagram selfie two weeks ago at the conclusion of her tour in Spain.
"We did it! We survived an entire tour without canceling any shows!" she wrote that time before adding, "Thank you @darylsabara for being so amazing.