Kellan Lutz and Australian actress Sharni Vinson have reportedly rekindled their romance.

Sources tell US Weekly that the couple, who previously dated for a year and a half but split in May of this year, are giving their relationship another shot.

The source told the mag: "They are back seeing each other, they do have a great time.

"They are trying to be fairly quiet about it, but they're not staying in a bunker or anything. Just a little more discrete."