The War Horse star is shooting his latest project Sunshine on Leith, a big screen adaptation of The Proclaimers musical of the same name, in Glasgow, Scotland and he was enjoying a break when a driver lost control and crashed into another vehicle just yards from where he was standing.
A witness tells Britain's Daily Record newspaper, "Peter looked really shocked. He was outside enjoying a cup of tea and a cigarette when it happened.
"The cars collided just a few yards away from where he was standing and he looked quite taken aback. Once he found everyone was OK, he started smiling again and went inside."