Benedict Cumberbatch is set to marry Sophie Hunter later today (14.02.15).

Benedict Cumberbatch and Sophie Hunter

Benedict Cumberbatch and Sophie Hunter

The couple, who announced their engagement in November shortly before confirming they are expecting their first child, have planned an extra special Valentine's Day and will exchange vows in front of family and close friends, including Keira Knightley, during a church ceremony on the Isle of Wight, England.

The 38-year-old actor's 'Sherlock' co-star Martin Freeman, 43, is expected to serve as his best man, according to The Sun newspaper.

The 'Imitation Game' star and the theatre director, 36, were first spotted looking at venues on the island last month and marquees were erected in the gardens of their reception venue on Thursday (12.02.15).

Vans supplying food, sculptures and flowers were seen making deliveries on Friday (13.02.15).

All roads close to the church have also been closed off for the occasion and security guards are on patrol.

The couple are expected to postponed their honeymoon until after the Oscars in Los Angeles on February 22, as Benedict is nominated for Best Actor at the prestigious event.

But the newlyweds will fly back to the US shortly after tying the knot so the actor can appear on 'Jimmy Kimmel Live' on Monday (16.02.15).

A source recently revealed the duo, who met on the set of 'Burlesque Fairytales' in 2009 but only started dating last year, were eager to get married before welcoming their baby into the world this summer.