I have to state that these are all technically "unconfirmed" but I will add to the possibilities as I come across them. I have a feeling that out of the 30-40, 000 that were built, 55,000 were owned by celebrities.
Also thanks to the other contributors on this site as I have shamelessly plagiarized the content below.
Michael Douglas
Bjorn and Agnetha of ABBA
Peter Fonda
Jackie Onassis (e3)
Mountain Girl (Jerry Garcia's wife) one of them
Kenny Logins
Gene Wilder (unconfirmed)
Susan Dey
Robert Downey Jr
Robin Wright
Sean Penn
Richard Conway (ok)
Sean Connery
Sandy Koufax
Does Grace Van Owen from LA Law count? (she totally counts)
Hugh Heffner
From a previous post:
Chris Amon (RHD CSL)
Sean Connery (RHD CSL)
Victor Gauntlett (RHD CSL)
George Michael (RHD CSL)
Malcolm McDowell (CSL serie 2)
Sepp Meyer (CSL serie 2)
The Prince of Lichtenstein (CSL serie 2 Alpina)
Jochen Neerspach (Bat)
Ronny Peterson (Bat)
Uli Hoeness (Bat serie 3)
Hans-Joachim Stuck (Bat Serie 3)
Jeremy Clarkson
Jerry Garcia and Phil Lesh had 3.0 CS coupes Bob Weir 2800
Eric Stewart of 10CC had a RHD Verona CSL
Francis Rossi of Status Quo had a gold CSA. Their manager had a black Tii..
David Nixon (famous TV magician at the time..) had a polaris CSA
Norman Wisdom (remember him ?..) had an E3.
David Crosby of the Byrds and CSN/CSNY had an e9 also
Carol King
Gina Gershon
Michael McDonald- Doobie Brothers' lead man
George Harrison (Beatles) CSA - Reg Number LYR111K
Jay Kay CSL BATMOBILE
George Carlin
Bob Marley - E3
Simon Le Bon, Polaris Bat.
Courtney Cox had a coupe (e9wayne owns it now).
Bob Dylan's Atlantic with White Leather!
Tom Selleck
Harold Ramis-Ghostbusters
Doug Kenney -co-founded the magazine National Lampoon in 1970