Upgrading from Wotlk require update?

[dal2000]

Ok my current version is all up to date. Now this is without cataclysm added to the account. I want to upgrade my wotlk account to cataclysm tonight. Am I going to be downloading any updates if I upgrade? If so, how big? I'm not on uncapped btw.

Thanks

 

[Riot2]

yes, if doing a digital purchase, there is a download
its about 800mb if ur wolk was as up to date as it could go pre-cata launch