Good Morning Britain's Susanna Reid and Kate Garraway prove they aren't afraid to get down and dirty as they take part in pitiless Tough Mudder challenge

Tough mothers! Good Morning Britain's Susanna Reid and Kate Garraway swapped their on-set sofa for mud-infested park as they took part in the relentless Tough Mudder challenge on Wednesday

Celebrating in style: Susanna performed a spirited cartwheel as she waited for the race to kick off 

Always laughing: Susanna couldn't contain her laughter as she and Kate walked along riddled in mud

Action girl: Susanna, 44, proved she wasn't afraid to get down and dirty as her ensemble of form-fitting leggings and a long-sleeve black tee wound up covered in grime as she delved into the obstacle course

Hold on tight! The girls looked in high spirits as they pulled one another through the dirt

Sliding down: The TV stars got down on their hands and knees to scale down the muddy slope 

Not afraid: The TV presenter looked to thrive on the challenge as she stood victorious on a slope covered in mud

Team effort: Joining her on her muddy mission was co-star Kate, who looked to have made her pink T-shirt and black leggings even more filthy

Down and dirty: The GMB favourites emerged covered head-to-toe in mud

In need of a wash: Kate looked like she couldn't wait to get changed after the race, with mud all over her face

Helping hand: The presenters kept an eye out for each other during the course to avoid falling 

Holding on tight! Susanna persevered and never gave up throughout the tough course 

Tough challenge: The television star got down on her hands and knees as she attempted to crawl up a slope 

Glam as ever: Susanna surprisingly didn't forgo jewellery, wearing a pair of giant gold hoops earrings

Joining in: GMB's weather girl Laura Tobin put on an energetic display ahead of the Tough Mudder race

What a hero! Co-star Ben Shephard also took part in the assault course and was seen helping along other women taking part in the challenge

Going for it! Her mud-soaked legs didn't deter Susanna's focus and determination

Taking one for the team! Kate looked to fall deeper into the mud as she attempted to help pull Susanna further along

No holding back: Susanne appeared to put her heart and soul into the challenge as she slid down muddy slopes

Brr! Susanna pulled a face as she jumped waist-deep into the freezing cold water 

Run for your life! The GMB host cut a sporty figure in black leggings and a grey top 

Show of support: Sean Fletcher and Ben Shephard cheered on the girls while Susanna congratulated her fellow runner

Sprightly: Susanna and Laura barely looked out of breath as they jogged along in the grass 

Group shot: The GMB stars celebrated in style following their muddy ordeal, cheering after crossing the finish line

Sharing the load! Joining them on their adventure day was The X Factor's Sam Bailey and former Liberty X singer Michelle Heaton

Swinging along: Michelle looked a little alarmed as she jumped off the platform into the air 

Bracing herself: The star prepared to submerge herself in the freezing cold water 

Making a splash: Michelle sported a full face of make-up for the gruelling obstacle course 

Getting a leg up: The former Liberty X star, clad in a pink and black outfit, scaled a log with the help of a pal

Girl power: Michelle joined forces with Kimberley Wyatt and slimmed down X Factor star Sam Bailey

Proud: Susanna and Kate held one another in delight after completing the almighty course

Feel the burn: The runners got warmed up with a series of push-ups in the grass

Pipe dream: Participants had to climb out of an open pipe into the water 

Make-up free: Kimberley Wyatt showed off her natural beauty by going make-up free during her outing c

Tough cookie: The former Pussycat Dolls singer performed her best crawl as she powered on through 

Helping hand: X Factor winner Sam showed off her newfound athleticism as she helped Kimberley along