Little Britain funnyman David Walliams has dived straight into his cross-Channel swimming challenge.
David set off from Shakespeare beach in Dover at 5.31am after being guaranteed the conditions were good enough for him to start.
The 34-year-old is attempting the estimated 16-hour swim in an effort to raise £500,000 for Sport Relief.
David will have to dodge jellyfish, seaweed and sewage along with tankers and boats as he front-crawls his way across the Channel - the world's busiest shipping lane.
The odds of David successfully completing the challenge are stacked against him, less than 10 per cent of participants make the gruelling 21-mile swim.
Just before taking the plunge David said: "I've been training for months now and to be honest I just want to get in there now and give it my best shot."
Former Olympic pentathlete Grey Whyte has been putting David through a vigarous training programme over the last 11 months and will be by his side in a boat throughout the whole challenge.
David's efforts are being broadcast throughout the day and a documentary about the swim will be broadcast on July 13.
Copyright Speakers Corner 2016