She really must be!
She has that bag of hers, shes a bit of a smarty pants, and in the sequel film shes going to be younger with a different face so has clearly regenerated!
Dh asked where i thought her tardis was then, so i said it was clearly parked in the clouds, like matt smith did at one point & that she used her brolly to float down gracefully from the clouds rather than use an invisible ladder.
After all, in the first film you do see her sitting in the clouds looking into her makeup compact 