Michelle Rodriguez and Zac Efron Spark Dating Rumors

Michelle Rodriguez and Zac Efron spark dating rumors after an extended Italian vacation.

After an Instagram video surfaced showing Zac Efron and Michelle Rodriguez vacationing together in Italy, the two have become the focus of media attention-and don't seem like they're going to make a move to combat dating rumors anytime soon.

The two were spotted in Sardinia again, this time as they embarked on a boating excursion together July 2. The two reportedly set sail around 11:30 a.m. and didn't arrive back on land until 4:30 p.m., and onlookers who saw the two together admitted they seemed relaxed and happy in one another's presence.

"They both looked really happy," the source told E! News.

The photo surfaced just days after avideo by the pair's host, Italian entrepreneur Gianluca Vacchi, uploaded a video of them on his Instagram page, where they lounged on a wooden dock on Vacchi's property. A shirtless Efron is seen in the clip as he gives an upside-down and bikini-clad Rodriguez an appreciative once-over.

Vacchi also posted a video to his page of Efron, himself and dancer Youssef Giga dancing on a table to Jason Derulo's Wiggle.

In the video, where Efron showcases some impressive hip movements and thrusts, Rodriguez can be heard in the background, yelling and cheering the 26-year-old actor on.

A second video, which Vacchi posted on his Instagram account July 1, also showed another dance routine that featured Efron showing off his moves, though this time, Rodriguez also joined in on the fun. That video featured the song Turn Down for What By Lil' Jon.

Rodriguez was most recently linked to model Cara Delevingne, while Efron hasn't reportedly dated anyone seriously since ending his five-year relationship with High School Musical co-star Vanessa Hudgens in 2010.

Jacked from Enstarz