Nina Agdal and Jeremy Piven "Definitely Flirting" With Each Other During Charity Event

Is there love in the air or just some friendly competition?

E! News learns that there was chemistry between supermodel Nina Agdal and Jeremy Piven during their charity event in New York City yesterday. "They were definitely flirting and chatting a quite a bit, although that's not out of character for Jeremy," the source tells us.

However, Piven may have been trying to psych his opponent out.

The duo, as well as special guest actor and comedian Mario Cantone, competed in the first ever Kiehl's Since 1851 "Ride for Charity" event.

If that was the Entourage star's motives, it didn't work.

Nina competed in 60-second cycling competitions on Flywheel bikes at the NYC Kiehl's Flagship store against Jeremy, Mario and consumers, and was the clear champion, beating both Jeremy and Mario, while raising funds for Food Bank for NYC.

"Had so much fun riding for charity @FoodBank4NYC with @Flywheel @Kiehls thanks to @jeremypiven for competing with me," Agdal tweeted.

Piven responded, "I want a rematch."

The event, which raised a total of $5,000 for the Food Bank for NYC, provided 25,000 meals for families in need.