Kellan Lutz, "Twilight Saga" Actor is dating his ex-girlfriend again! The "Hercules 3D" star, 28, is seeing Sharni Vinson, a 30-year-old Australian model and actress who still loves her ex-boyfriend.

According to US Weekly, multiple sources confirmed the former flames are back together just three months after breaking up.

The couple had ended their one-and-a-half year romance in early May, but are enjoying each other's company once again, said a source to US.

"They are back seeing each other, they do have a great time," the source said. "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 twosome, who met while reading for roles in "Step Up 3D" which Vinson landed the female lead, had been apart from each other for a while.

"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 insider added about Lutz. "They spend a lot of time together when in L.A."

Lutz was apparently still feeling the love for Vinson after having tweeted her a happy birthday message on July 21.

He posted, "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 actor was head over heels for her, explaining why she's so great during a Ryan Seacrest's KISS-FM radio show interview in Nov. 2011.

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

Tell us what you think of their rekindled romance in the comments section below!