Bella Thorne has vowed to boycott the Teen Choice Awards.

The 20-year-old actress has hit out at the annual ceremony for "messing" with its young audience's heads, and even claimed the voting is "rigged" in a series of angry tweets.

She wrote: "Teen choice is gross. The fact we are even voting against each other messes kids heads like a beauty competition...

"I'm #boycottingteenchoice besides it being rigged it's just f***ed up."

The star finds herself on the shortlist for both the Choice Drama Movie Actress and TV Actress prizes and she and Patrick Schwarzenegger's pairing in the former has earned them a nomination for Choice Movie Ship.