Though Robert Pattinson and Dylan Penn haven't made their "relationship" official yet, there's definitely a romance between them, sources confirm.

Robert Pattinson and Dylan Penn are not calling each other "boyfriend - girlfriend" yet and they don't plan on doing so anytime soon. The two are in no hurry to make their "relationship" official but a source confirmed to E! Online that there's definitely a romance going on between them.

The Twilight star and model daughter of Sean Penn and Robin Wright appear to be well suited for each other.

"Dylan doesn't want to be famous," the source said to E! Online. "She doesn't want to be an actress. She wants to be a screenwriter. She's been approached about acting work, but it's not her thing."

The duo was first spotted hanging out together in September at the Chateau Marmont in West Hollywood after seeing a show by rapper Mickey Avalon. Ever since, the two have been spotted together, sparking dating rumors. Pattinson has been linked to various women since his split from Kristen Stewart who cheated on him with "Snow White and the Huntsmen" director Rupert Sanders.

Recently it was reported that the "Twilight" stars were looking to rekindle their romance. However, after a few days of being spotted with Stewart, Pattinson returned to his partying ways and was seen with Penn attending a private bash for the launch of Angie Banicki's new book "30 Before 30" at the Roosevelt Hotel. Though it wasn't a typical date night, and neither had the two arrived together, witnesses confirmed they were seen hanging out with each other in the bar area. A source also confirmed to E! Online that the two left around the same time, but separately.