The Trigger Happy TV comedian will star in new hidden-camera prank series Fool Britannia, which will reportedly air on Saturday evenings in October for eight nights.
It will be broadcast before The X Factor, in the slot previously taken by Harry Hill's TV Burp, which is likely to end its run this year.
Joly tweeted: "If you are in the UK you are now a legitimate target. [It] will never be as good as the superb TV Burp but [I] will give it my best."
The comedian was said to be developing a new reality series last year with ex-Big Brother producer Daniel Nettleton.
> Harry Hill: 'TV Burp will end in March with huge finale'
Watch a clip from Trigger Happy TV below: