They're amongst the most talented, fittest and most competitive people in the country - but it's fair to say that some of Team GB's leading athletes don't have a future in comedy when they decide to call time on their careers.
Jessica Ennis-Hill, Sir Chris Hoy, Adam Gemili, Katarina Johnson Thompson and Sally Brown have all been getting involved in the #JustImagine campaign - which is designed to raise awareness of what life might be like if the National Lottery weren't able to provide £33 million worth of funding to good causes each week as they do now.
In the video the UK stars are asked to tell their best bad jokes - with inevitable consequences.
Check it out above!
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