Photo Credit: Allen Berezovsky; Jason Merritt/Getty Images
Us Weekly confirmed the relationship after TMZ first spotted the football star, 25, and the Push actress, 26, bowling on at Latitude 30, an entertainment complex in Jacksonville, Fla.
"They were grabbing kisses and holding hands," a source tells Us. "He put his arm around her a few times."
The source also said that Tebow "was a true gentleman, helping her on the stairs when they went to the arcade area."
Tebow is famous as one of pro sport's most visible Evangelical Christians, and even trademarked "Tebowing," his signature on-field genuflection pose, to prevent its abuse.
Belle is known for dating another devout entertainer, popstar Joe Jonas, from 2008 to 2009. Jonas once publicly pledged to remain a virgin until marriage, a promise that Tebow has also made.
Last month, Tebow told Vogue that he was looking for a woman with a "servant's heart" -- a term common in Evangelical circles to mean not a subservient person but one devoted to helping others.
"Obviously looks play a big part," he said. "But," he adds, "there's also so much more than that for me."