Jon Hamm says Daniel Radcliffe has handled fame with ''enviable'' grace.

The 'Mad Men' actor appeared alongside the 'Harry Potter' star in 'A Young Doctor's Notebook', and he admitted his former co-star could indulge in a life of luxury to a much greater extent than he has so far, and suggested he has done well to remain grounded.

He said: ''I think he is massively talented. For the majority of his teens he was the most famous person in the world, in the eyes of 13 to 18 year olds, but he has handled it all with a grace that is enviable.

''He could buy a castle in the Highlands and be done with it!''

Jon laughed off the suggestion his success on 'Mad Men' could afford him the same opportunities, and joked he would be more likely to sponge his friendship with Daniel.

He said: ''No, ['Mad Men' is] not a £100 million experience for me ... But I could live in Dan's smaller castle on his grounds and we could play cricket together.''