David Walliams thinks Davina McCall is "strong" for continuing to compete through her Sport Relief triathlon.
The 42-year-old comic has praised the former 'Big Brother' host for taking part in the gruelling seven-day charity challenge - which sees her cycling, running and swimming from Edinburgh, Scotland, to London - and believes she is doing a great job.
David raised over £1 million for Sport Relief in 2006 by swimming the English Channel and understands the hardship Davina, 46, is going through.
Speaking to BANG Showbiz, he said: "I think it shows that in these challenges you are pushed to the absolute limit. But I know she's quite a strong person both mentally and physically.
"The best way we can get behind her is donating, because that'll be the biggest thing that will make her happiest, to know people are behind her and care."
The 'Britain's Got Talent' judge admits he couldn't tackle a triathlon like 'Got to Dance' host Davina because he is not good at running or cycling.
He added: "The reason I couldn't do a triathlon is because you have to do three different things. I'm only good for swimming, whereas on a bike, I'm too heavy, and going for a run, I'm too heavy. You have to be lean to do the other things."
In support of Davina, BT has declared today (13.02.14) Dial for Davina Day and will donate 1p to Sport Relief for every phone call made from a BT home phone line, BT business line and every call made from a BT payphone.
To participate in Dial for Davina Day, people should simply pick up their BT phone and make a call on Thursday, February 13.
Tagged in David Walliams Davina McCall