Rumours have been circulating that the Sherlock actor has been dating Russian model Katia Elizarova, but he insisted that they are "just old friends".
The star has been seen on a series of dates with the model, who has worked on projects for Chanel and Versace.
The pair most recently attended supermodel Natalia Vodianova's charity launch together in London on Wednesday (August 29).
Cumberbatch was reported to have been inseparable from 26-year-old Elizarova at the event, but he denied the rumours that they are in a serious relationship.
He laughed off the reports to the Sunday Telegraph: "We're just old friends. I can't say any more than that."
The star also added that his friendship with the model is helping him develop his foreign language skills: "Russian is a wonderful language. I'd love to be able to master it."