Who? Calista Flockhart and Harrison Ford
What? The couple took an interesting - even postmodern - approach to dressing up for Halloween. Harrison and Calista seemed to mock their much documented 22-year age gap with the former dressing as a pensioner and the latter dressing as a nerdy schoolgirl. We get the joke, we're just not sure if it's funny, or a bit creepy?
Where? Brentwood (Los Angeles, not Essex)
See what the rest of the A-list wore last night: