"Twilight" actor Robert Pattinson has been quite active attending parties in Los Angeles for some time now. This observable change in the actor's activities has instigated some rumors and speculations.

In the latest reports, he was allegedly thought of doing drugs. But does Kristen Stewart know about this?

Celebritylaundry.com reported the "Twilight" star is allegedly using cocaine with the photo that surfaced in the Internet. Reportedly, Pattinson was partying in LA with Hollywood Friend Composer Mario Fanizzi. In a photograph where both the friends were posing in a camera, one can observe a mysterious white powder packet being exchanged behind them. This photo posted on Facebook account of Mario Fanizzi Nov. 18 has caught much of the attention and aroused speculations.

The person exchanging the mystery bag of white powder was unidentified. The photo has got everyone wondering about the reality behind it, but it could be also that Pattinson was simply standing, merrily posing and totally oblivious to what was happening behind him.

This was not the first time that Pattinson has been reportedly doing drugs. Earlier, in October, he was rumored involved in a cocaine spree. Reports claimed he was spotted using drugs in a VIP area of the Viper Room club while attending Mickey Avalon concert Sep. 7 with his friend, Dylan Penn.

"Pattinson was snorting bump after bump of cocaine. Wild cocaine binge that spanned three different locations and lasted nearly until dawn," a source claimed as reported by Star Magazine.

"Rob was doing coke all night... Rob tried to be subtle by scooping the coke out of a baggie with a key, but he was still in plain view of others in the room - and he looked like he knew exactly what to do," the source added.

The reports also claimed the star "continued to party excessively" at Chateau Marmont.

In April, another incident of the actor allegedly doing drugs surfaced. He was spotted with then girlfriend Kristen Stewart while smoking a joint at the Coachella Music Festival. Back in 2009, it was Kristen Stewart who was reportedly using drugs while the couple was out for dinner in Italy.

Meanwhile, actor's ex-beau and "Twilight" co-star Stewart was spotted partying with friends at a place called Gjelina in Venice on Dec. 2. She was there to attend a friend's birthday party.

According to HollywoodLife.com, a source revealed that they drank a lot of wine and shared food. Their menu included gluten free chocolate cake and butterscotch pudding with salted caramel. It was told Pattinson's team wants him to control his partying behavior and focus more on his work.

Do you think Stewart will approve of Pattinson's wild party behavior indulgences?