The "Star Wars Episode 7" production will reportedly start filming in May, but franchise stars Mark Hamill, Carrie Fisher and Harrison Ford has already been spotted in London.

With May 4 right around the corner, many are speculating the film's casting announcement will take place during Star Wars Day. Photos and tweets from the cast have surfaced on Twitter, check them out below.

Disney Chairman Alan Horn recently revealed to Bloomberg TV the "Star Wars" cast is "almost complete."

"We're not prepared to announce it yet, but we will be very shortly," Horn said.

The "Star Wars" production yet to confirm their official cast, but "Lost" actor Dominic Monaghan explained to DweebCast what director J.J. Abrams is searching for when it comes to his lead actors.

"[Abrams and I] talked about it a few times. Once I knew that he was doing 'Star Wars' I sent him a little congratulatory message and stuff," he told DweebCast. "We've talked a few times about it and he said 'We're putting together a cast of essentially unknowns. We want to follow the '77 'New Hope' cast'."

"Because obviously Harrison Ford wasn't well known at that point, Mark Hamill wasn't and Carrie Fisher wasn't either," he added. "What he said was, 'We don't want to fall into that mistake of people going 'Oh it's that guy from that thing!' and then you're completely out of the 'Star Wars' universe.' "

Actors Adam Driver, Lupita Nyong'o, Zac Efron, Gary Oldman and Benedict Cumberbatch are just a few names allegedly connected to the "Star Wars Episode 7" cast. However, Cumberbatch has during a Twitter account for a Q & A session he will not be a part of Abram's production.

"I would've liked a part in J.J.'s new Star Wars but it won't happen sadly," Cumberbatch tweeted.

"Star Wars Episode 7" will be released to theaters on December 18, 2015.

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