Jonathan Parmer Tickle (born 8 May 1974) is a British television presenter who initially rose to fame as a contestant on the fourth series of the British television show Big Brother.

[5] He was also a contestant on a celebrity edition of the game show Distraction, winning £6,500 for Cancer Research UK.

In September 2018, after ten years off television, Tickle appeared on Big Brother's Bit on the Side, to mark the final series of the reality show.

He has gone on to co-present Brainiac: Science Abuse, a series of science-based shows on the UK television station Sky One.

[3] His best-known stunt, shown on other shows such as QI and MythBusters was of Tickle walking on a pool full of custard powder and water.