"Six degrees of Kevin Bacon," she said. "And I'm going to give you the most fucking obscure pairing I can think of."

Craig Charles (Lister from Red Dwarf) to Brad Pitt (well-known nancyboy) - 4 degrees.
Craig Charles ==> Christopher Barrie (Lister) in Red Dwarf.
Christopher Barrie ==> Jon Voight in Tomb Raider.
Jon Voigt ==> Tom Cruise in Mission Impossible.
Tom Cruise ==> Brad Pitt in Interview With The Vampire.

"Fine," she grumbled. "This'll stop you. Dieter Brummer to... oh, Alec Guinness."

Fuck!

OK.

Dieter Brummer (munchkin from Home and Away) to Alec Guinness (Jedi Master) - 6 degrees
Dieter Brummer ==> Melissa George in Home and Away
Melissa George ==> James Marsden in Sugar and Spice.
James Marsden ==> Hugh Jackman in X-Men.
Hugh Jackman ==> Meg Ryan in Kate and Leopold.
Meg Ryan ==> Carrie Fisher in When Harry Met Sally.
Carrie Fisher ==> Alec Guinness in Star Wars.

Whew! Just made it!

Anyone do any better? (I was just working off the top of my head there, so consultation with IMDB will be considered Cheating. But go ahead.)