The 38-year-old comedian, who announced he was "in a relationship" recently, was spotted with on-and-off partner Jemima at a film screening, reported Femalefirst.
The 'Arthur' actor looked happy as Jemima put her arm round him at the screening of new documentary 'Unmanned: America's Drone Wars', which she co-produced.
Jemima, 39, who was earlier married to cricketer Imran Khan, also posted a photograph on micro-blogging site Twitter of the comedian posing in front of a wall with graffiti art of his face.
In the photograph her white dog, Brian, can also be seen. "Brandalism! Brian's the first convert," she wrote.