Star of Hot Fuzz, Shaun of the Dead and Run Fatboy Run visited a butterfly conservation project in Chiswell Green this week.
Simon Pegg was spotted at Butterfly World last Friday with his daughter and a friend.
The project took to social media to share a picture of the star.
The photo was captioned: "We've spotted something unusual. It's that rare native species Simon Pegg. It is not the first time Simon has visited us and you never know when you might spot him next."