Reality TV
James Curley/Rex Features
The Big Brother 3 winner is taking part in the 26 mile run on April 13 to raise money for a Cystic Fibrosis charity.
Lawler has started accepting donations via her MySpace page and has vowed she will strip off for the event if enough cash is raised.
The reality TV star said: "On Sunday April 13, 2008, I shall be running the London Marathon.
"It is 26 miles [41.8km] and all money I raise shall be donated to my charity Cystic Fibrosis. You can help by donating just £2 ....or £2,000!
"Every penny counts and if I raise £20,000 by April 13 I will run the marathon in my underwear only! Yes that is a promise."
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