His arch-enemy on film, Emma Watson - who played Hermione - looked a bit chilly but very cool in summery white peasant top and floaty skirt.
Once inside we were seated with all the celebs for the film and Claire Richards was having a good old giggle with some pals she'd brought along.
But what was the film like? Full of action, big on laughs and daft as they come. A silly summer hit!
If it wasn't for you meddlin' kids...
Scooby-Doo is out in the UK on 12 July