Rumors have been circulating for weeks since they were first spotted vacationing together in Italy, and now, Neighbors star Zac Efron and Fast and Furious actress Michelle Rodriguez appear to have finally confirmed their shocking new romance with a romantic kiss.

Michelle Rodriguez, Zac Efron Spur Dating Rumors?

The 35-year-old actress and 26-year-old actor were spotted enjoying a session of PDA while on a yachting excursion, complete with a deep kiss and tons of touchy-feely hands-on behavior.

See pics of the pair here.

Michelle Rodriguez and Zac Efron Continue Seeing Sparks Fly In Italy?

Rumors first began flying about the two in late June, after their host, Italian entrepreneur Gianluca Vacchi, posted a series of videos on his Instagram page which showed the two actors enjoying one another's company.

In one video, they share a dock with Vacchi and his girlfriend and are officially welcomed to Italy. Rodriguez does a headstand in the video while donning a black bikini, as an appreciative-looking Efron gives her a very clear once-over.

Another video showed Efron dancing on a table and showing off some sexy dance moves and hip thrusts, as Rodriguez cheered him on off-camera.

This is the first high-profile romance Rodriguez has had since ending things with 21-year-old model Cara Delevingne in May.

The openly bisexual Rodriguez confirmed she and the model were dating in February, and the two seemed virtually inseparable for months, including on a Mexican vacation where they were seen frolicking in the ocean together and sharing kisses.

However, after the two spent several weeks apart beginning in April due to work commitments in opposite countries, their romance appeared to cool. Neither had appeared to confirm a split however, though Rodriguez may be doing so now.

Efron, who completed a secret rehab stint in the Fall, has not been involved in a high-profile romance since splitting with his High School Musical co-star Vanessa Hudgens in 2010. The two had been together five years.

Despite not being serious with anyone since Hudgens, Efron was recently reported as looking for a girlfriend, and had reportedly had his sights set on Ryan Gosling's reported on/off girlfriend, Eva Mendes.

"Zac has compiled a 'wish list' of eligible women--and Eva Mendes heads the list," a source told Radar Online in June. "Zac wants to date someone who's not intimidated by fame and who can challenge him intellectually."

Tags: Michelle Rodriguez Zac Efron