By Staff Reporter (media@latinospost.com) | First Posted: Apr 16, 2014 06:11 AM EDT

Zach Efron is rumored to be dating his "Neighbors" co-star Halston Sage.

An unnamed source told E! News that the two are most definitely hitting it off. "They are definitely an item," the source told the entertainment news site.

"They were seeing each other a bit during filming of their movie together and ever since he went to rehab they got a lot closer. Her friends love him and say he is so sweet. He's really good to her," E! News' source added.

Hollywood Life notes that the alleged pair were seen getting comfortable with each other at a basketball game. Zac and Halston allegedly got real close during a match between the Los Angeles Lakers and the Dallas Mavericks at the Staples Center on April 4, reports the outlet.

The two were allegedly flirting with each other throughout the ball game, says the Daily Mail. "But while the former 'High School Musical' star's attention was fixed on the court, Halston appeared more interested in her companion for the evening," reads the report.

Zac Efron was previously rumored to have had a "secret girlfriend" that he has managed to keep hidden from the public eye. In an earlier report, a source allegedly close to the 26-year old actor told Hollywood Life, "He's had a serious girlfriend for a while now and he's managed to keep that totally secret so I'm not surprised he was able to keep his trip to rehab secret for so long."

On the other hand, Zac's "Neighbors" co-star, Halston Sage, was fresh off a relationship according to E! News. The actress and "Glee" star Chord Overstreet reportedly announced their split just a few days after photos of her and Zac Efron during the ball game made their way online.

Neither Zac nor Halston has confirmed the dating rumors but the two will definitely be seen together in the upcoming comedy film, "Neighbors" which graces theaters May 9. Watch the trailer for the film below.

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