Rumors are starting to circulate that Sienna Miller is “dating” her co-star in the new movie “Camille”, James Franco. Franco is best known for his role as Harry Osbourne in The Spiderman movies. “Camille” is about two honeymooners and their road trip to Niagra Falls.

During filming Friday afternoon, the leading pair had to roll around the hay kissing as Franco’s shirt was off. Once the set wrapped, sources say the couple took the on-set frolicking off-set, well into the evening. The two took in a concert and were seen canoodling and dancing in the streets together. Around midnight, Miller and Franco got some Chinese food, enjoyed a cigarette together and hit the nightclubs.

The romance continued Saturday when the two were spotted taking in a matinee of “Pirates of the Caribbean: Dead Man’s Chest.” Franco was seen in the movie caressing Miller’s face. After the movie, the pair hit a bookstore called Indigo. (source)

Sienna Miller looks like she would be fun no matter where you took her. She’s cute as can be but with a dirty side; which is a nice combination. And she seems like she is really into miserable sex-based relationships that are destined to fail – which I happen to be really good at. She’s actually perfect for me. Although, I’m going to let her know right up front that I’ll probably sleep with her sister. These images are of the two in Toronto. and the obligatory NSFW images after the jump.