Emotional Davina McCall broke down in tears as she completed her gruelling 500-mile (805km) journey from Edinburgh to London today.
The presenter crossed the finish line outside Tate Modern at 4.10pm to conclude the final leg of her arduous physical challenge for Sport Relief.
McCall, 46, ran a full marathon distance to round off seven days of running, cycling and swimming for charity.
After her feat was described to the waiting crowd of around 100 people, McCall said: "I can't believe it was me.
"Thank you to everybody who has donated - that is why I did it - the team that got me here, they carried me through the threshold.
"My kids and my husband were amazing."
She joked: "I have got to stop crying!"
McCall was greeted by her children and husband, Matthew Robertson, just before the finish line.
He gave her wedding ring back to her, which he had been looking after during her journey.
The BT Sport Relief Challenge: Davina - Beyond Breaking Point has so far raised over £760,000 for charity.