The 35 year-old, who has won hordes of fans in the hit series based on the stories of Sir Arthur Conan Doyle, has been seen at numerous Hollywood parties with the 27-year-old model over the past month.

It comes after the former "Supermodel of the Year”, who uses the surname Hearst in her professional life but was born Hearst-Shaw, was observed with Cumberbatch last month at a Vanity Fair party Cecconi's, the Hollywood restaurant.

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After several months in captivity, Miss Hearst shocked her family when she joined her captors to help further their cause.

She adopted the name Tania – after a member of Che Guevara's circle – and was photographed with a rifle for an SLA poster, which became a famous image of the 1970s.

He created the largest newspaper and magazine business in the world, which at its peak had 30 publications across the US.

That Instagram snap shows Chris and Lydia, 30, coupled up at the GQ Men of the Year Party, which was held in Los Angeles on December 4.

Hearst went on to take part in a bank robbery with other SLA members and was arrested.

She was sentenced to seven years in jail in 1976, despite her defence that she had been brainwashed by her captors.Mr Shaw is now the head of security for the Hearst Corporation, while Patty, 58, has dabbled in acting.The couple have another daughter, Gillian, the Town & Country associate editor, now 29.The 43-year-old is wearing a black suit which goes perfectly with Lydia’s black strapless dress with sheer paneling. In addition to posing on the GQ red carpet last week, the lovebirds also shared a sweet smooch, which you can see in the photo above.“They have been friends (for) a while now, but to say they are dating is probably too strong,” he told the Daily Mail. to film the Star Trek sequel, in which he plays a "baddy".