Russell Brand's girlfriend has sparked engagement rumours after she was spotted wearing a ring on her wedding finger during an outing with the funnyman.

The actor/comedian has been dating British socialite Jemima Khan on and off since last year (13), and they fuelled gossip about the status of their relationship during a day out in London on Saturday (22Mar14).

Khan was photographed wearing a gold ring on her left hand, prompting speculation the couple is planning a wedding.

They have yet to comment on the rumours. Brand was previously married to pop star Katy Perry, while Khan previously dated actor Hugh Grant.