It's been about three months since Kellan Lutz and Sharni Vinson called it quits, but it seems like they have reunited, according to an US Weekly report.

"They are back seeing each other, they do have a great time," a source told the magazine. "They are trying to be fairly quiet about it, but they're not staying in a bunker or anything. Just a little more discrete."

The source also said the rumored couple has been in each other's company as much as their busy schedules permit.

"It's been a little difficult with him away filming, but he went to her birthday party recently and was such a great guy," the source added. "They spent a lot of time together when in L.A."

Lutz is currently filming Hercules 3D, an upcoming action-adventure film directed by Renny Harlin. The film also stars Gaia Weiss, Scott Atkins, Roxanne McKee, and Liam Garrigan. It will be released on March 14, 2014.

In July, Lutz also wished Vinson a birthday via Twitter:

"Huge Happy Birthday to the amazing @sharnivinson (Sydney Time ;)) and a Happy Birth Day to the wonderful @narellevinson for bringing such a beautiful soul into this world!"

The 28-year-old Twilight star and 30-year-old Australian model/actress were dating for a year and a half before calling things off in May. 

The couple met for the very first time at a reading for the film Step Up 3D (2010). Vinson would eventually land the role in the movie but Lutz did not.

In November 2011, he talked about his relationship with Vinson on Ryan Secret's KISS-FM radio show.

"She's a happy person, which really just clicks with me," he said. "It's just great to have someone you can smile with all the time. It's really special."

Tags: Kellan Lutz sharni vinson Dating hercules 3d Step Up