The only existing opportunity for guests to be in the parade is on the last float of the Disney's Cinema Parade.
The best thing to do is to ask at Studio Services, at the Front Lot of the Studios on the day you arrive if there is any places available on the last float (la char finale) of the Cinema Parade for the coming days. If you are there for only 1 day ask very early, just after opening you may be lucky!
You can also write to Disney beforehand, requesting a place and include the date of your visit, how many people (normally max: 4 per family) and your name, address and telephone number. Send it to;
Disneyland Resort Paris
Character and Parade Department
Bâtiment Merlin
B.P 100
77777 MARNE LA VALLEE Cedex 4
FRANCE
we were very lucky as we were just walking through the front lot in the studios and a cm stoped us and aked if we would like to go on mickys float ,my dd was in a minnie costume and i had minnie ears on so i think that helped it made our day
we were very lucky as we were just walking through the front lot in the studios and a cm stoped us and aked if we would like to go on mickys float ,my dd was in a minnie costume and i had minnie ears on so i think that helped it made our day