Later another, better photo of Robert Downey Jr posing for fans
An English Heritage spokesman said: “Due to a private special event, the second floor and roof of the Great Tower at Dover Castle is inaccessible between June 9 and June 24.
“Visitors are able to experience the ground floor and first floor of the Great Tower and the rest of the 80 acre site including the Secret Wartime Tunnels as usual.
“However between June 16 and 18, the whole of the Great Tower is inaccessible.
A picture of the chopper that is reportedly used in the shoot and has already been seen at the university shoot last week:.
Resident Kimberley Ferris also took this low quality photo of Robert Downey Jr. She's quoted: "He seemed to love our three-year-old daughter, came close to wave at her and posed to we were quite lucky."