Credit: David Tonnessen/

Kylie Jenner's love life is heating up!

On Sunday, Kim Kardashian's youngest sister, 14, hit The Grove in L.A. with a cute blond: Australian pop singer Cody Simpson.

"Yes, they went on a date," a source close to the tween model and reality star tells Us. Jenner and Simpson, also 14, met and flirted at last week's Breaking Dawn: Part 1 premiere in Hollywood "and have been inseparable since," the source adds.

And, so far, things are looking good for Simpson and Jenner, the youngest in the Jenner-Kardashian clan. (She's the youngest child of Kris and Bruce Jenner, who also have model daughter Kendall, 16.)

"I would say they are dating," the source surmises. "They are a couple! They are so cute together."

Tell Us: Do Kylie and Cody make a nice pair?