"The two have been dating for a few months," a source confirms to ET.
The former Miss Universe took to her Instagram page on Sunday to share a sweet video of Amendola dipping her while the pair stared sweetly into each other's eyes. Culpo captioned the clip, "VEGAS BABY."
In April, Culpo and the 30-year-old wide receiver were spotted holding hands while partying at the Coachella Music Festival in Indio, California.
Last Monday, Culpo and Amendola hung out together in Massachusetts where she snapped a pic with her beau in their car, and took him out for brunch at "the fam restaurant," Lulu's Allston, which is owned by her cousin Joshua.
All of this lovey-doveiness comes days before Culpo's ex, Nick Jonas, is set to drop his new (blatantly titled) album, Last Year Was Complicated, which is rumored to be all about his failed relationship with the former Miss Rhode Island.