Friday's Opening Ceremony of the 2012 Summer Olympics will have a slew of stars and celebrities. Which ones, however, is anyone's guess.

Oscar-winning director Danny Boyle -- who directed films such as "Slumdog Millionaire" and "127 Hours" -- was enlisted to direct the Opening Ceremony. And while he's been coy about what exactly to expect, he has drops some hints. And there are plenty of rumors to fuel the hype.

According to a blog post from MSNBC, Boyle confirmed that Paul McCartney and Queen Elizabeth will be part of the festivities. That's not all:

[Boyle] also revealed that the show may feature great characters from British books. "There's a very close connection between some of the great writers of children's literature who have been immortalized actually by Disney: Cruella de Vil, Captain Hook, Alice in Wonderland, The Queen of Hearts, but actually they originated in British literature. And the most famous of that is Peter Pan."

Will we be seeing these characters? "Yes," Boyle said, but quickly added, "I mean, if they work, yeah. There's always this problem that you might have to cut things because they don't work, you know. It's a live show."

If that weren't enough, the Associated Press had an article Wednesday speculating about a possible appearance from Muhammad Ali.

The ceremony begins at 9 p.m. London time, or 4 p.m. Eastern. NBC will air the event in its entirety starting at 7 p.m. Eastern.

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