The self-proclaimed "redneck" boyfriend of vice presidential candidate Sarah Palin's pregnant daughter will join the family at the Republican convention in Minnesota, US reports say.

Levi Johnston, an 18-year-old high school ice hockey player, has been the subject of intense media attention in the US since it was revealed that he was the likely father to 17-year-old Bristol Palin unborn child.

Johnston describes himself on his MySpace page as "f---in redneck" who likes to snowboard and ride dirt bikes, but "I don't want kids", according to US media reports.

"I like to go camping and hang out with the boys, do some fishing, shoot some s- -- and just f---in' chillin' I guess," he wrote before his MySpace page was removed. "Ya f--- with me I'll kick [your] ass."

The boy's mother, Sherry Johnston, told Associated Press there had been no pressure put on her son to marry Miss Palin and they had made plans to wed before it was known she was pregnant.

"This is just a bonus," she said.

Sarah Palin is scheduled to address the convention to officially nominate Sen. John McCain for president tommorow morning (Australian time) and it is expected her family, including Levi Johnston, will join her on stage at the end of her speech.