The rumor that Robert Pattinson may play Christian Grey, the lead character in the highly anticipated film adaption of the book 50 Shades of Grey, has resurfaced after the book's author attended a party at his house on Saturday. 

InTouch Weekly reported on June 23 that the author of the wildly successful novel series E.L. James attended Pattinson's Great Gatsby-themed birthday party, which he threw at his home on June 22 for his friend, film director Niki Jarecki, on June 22.

James and the film's production company have yet to announce who will play the role of the erotic novel's protagonist and the female lead, Anastasia Steele, a college student whom Grey has a spicy relationship with in the trilogy.

The British author admitted that the idea for 50 Shades of Grey romance novels were inspired by the Twilight book series. Pattinson played the lead in the film adaption of the Twilight books. James reportedly said in an interview a year ago that casting Pattinson for the 50 Shades film would be "strange."

The New York Post's Page Six reported on July 6, 2012 that James was asked by a fan at a UK book event to share her thoughts on the idea of Pasttinson and his ex-girlfriend Kristen Stewart, who played his onscreen love in the Twilight, playing the roles of Grey and Steele.

"I think it would be too strange," James told the fan. "It would just be...Ughm weird!"

On June 22, several attendees at Pattinson's party tweeted about James' attendance and revealed that Pattinson's ex-girlfriend Kristen Stewart was not there. Filmmaker Todd Michael Shultz mentioned Stewart's absence on Twitter.

"Kristen Stewart was not at the party as far as I know," Shultz wrote, according to InTouch Weekly's report.

Shultz also divulged on the social media about the partygoers at the event.  

He described it as a "real freakin party...everywhere you turn...someone super smart and talented and interesting to talk to."

He also shared that Pattinson "is a really cool guy, it's good not to lose sight of basic kindness." 

Schultz also disclosed that actress Michelle Rodriguez, songwroter Diane Warren and Rihanna's songwriter Sia were in attendance.