Robert Pattinson and Reese Witherspoon are getting to know each other a lot better as they begin to prep for their upcoming movie, “Water for Elephants.”

Now a source close to the film tells Fox411.com that the chemistry between the two so far is “magic.”

Pattinson and Witherspoon have gotten together for preliminary meetings and table readings before shooting begins on the film about a veterinarian (Pattinson) who joins a circus, and the insider said their rapport was instant.

“Rob worked with Reese seven years ago on ‘Vanity Fair.’ He had a tiny part and he joked with Reese that of course she didn’t remember him from their time together then,” said the insider.“They joke a lot and Rob has her blushing and laughing all the time. He’s very charming,” the source said. “He went on about how she is this beautiful, super-famous Academy Award winner, and Reese loved it. She was flattered and giggling while he teased. It’s cute and it makes for a great movie set. Everyone is excited because they fit so well together.”

The insider warns that Reese’s agent boyfriend Jim Toth had better watch out or he could lose his girl to the gentle charms of the man who plays the world’s most famous vampire!

And what about Pattinson’s rumored girlfriend Kristin Stewart? It turns out, that may have just been a rumor after all.

“Rob is not dating anyone. There are no plans for Kristin Stewart to visit the set and he tells everyone he is single,” the insider said. “Rob is smarter than anyone gives him credit for, he reads the Internet and pays attention to what people are saying. He is sharp and aware of everything. He’ll do the ‘Eclipse’ premieres and then focus 100 percent on Reese and ‘Water for Elephants.’ It’s like entering a whole new world for him.”

Could “Elephants” help turn Pattinson, 24, and Witherspoon, 34, into Hollywood’s latest June-September romance?

Stranger things have happened…

Source: Fox News