Following his break up with Kristen Stewart, Robert Pattinson has had no problem moving on. He was been romantically linked to various Hollywood hotties including Katy Perry, Riley Keough, and most recently his current co-star Sarah Gadon.

Reports are surfacing that the actor has been "getting close" to his "Maps to the Stars" cast mate Sarah Gadon while the two have been filming the movie in Toronto.

According to Entertainment Wise, they have been busy on the set of their latest flick and sources have said that they may be a little more than just friends.

An insider told The Mirror "The pair are filming out in Toronto and they have an obvious chemistry. They laugh a lot."

"But they are also very serious about their work and have been discussing their roles and rehearsing loads together, one on one."

[For a photo of Robert Pattinson and Sarah Gadon click HERE]

They source went on to say, "Sarah helped Rob choose a cool waterside property during filming and they have been hanging out a lot wherever possible. They share similar backgrounds. On paper they would make a very cute couple."

"Rob is in no hurry to get a new girlfriend, though, so officially he and Sarah are still very much just friends - but it's definitely a case of watch this space."

This may mean the actor may have to warn Gadon about his ex's habits. It was recently reported that Stewart called up Pattinson's latest romantic conquest, Keough, to tell her that she though her hookup with the star was "really uncool."

An insider revealed that Kristen "called Riley. She likes and respect her, but she just doesn't feel like it is ever right to go after a good friend's ex who is suddenly on the market."

However, Stewart did not turn the conversation into a screaming match, "It was a civil conversation where the takeaway was that Riley was sorry that Kristen felt that way", a source said.

Do you think Robert Pattinson and Sarah Gadon would make a cute couple? Leave us a comment below.