Possible Clues:

• 'I can't believe we both know him'
• Earth or Tatooine
• "Fancy seeing you here!"
• 'Y'all know each other?!'
• 'Huh, you know him, too?!'
• *'Crazy to run into you here!'
• 'You know so-and-so, too? How about that!'
• "It's a ___ after all"
• Ours is a minor planet it is sometimes said
• Minute Disney attraction?