Bristol Palin's boyfriend plans to join the family of the Republican vice presidential candidate at the convention in Minnesota.
Levi Johnston's mother said her 18-year-old son left Alaska on Tuesday morning to join the Palin family in St. Paul.
Sherry Johnston also said there has been no pressure put on her son to marry Bristol Palin, the pregnant daughter of Republican vice presidential candidate Sarah Palin.
"Absolutely not," Sherry Johnston told reporters outside the family's Wasilla home. Johnston said the two teens already had plans to marry before they knew she was pregnant.
Sarah Palin announced Monday that her 17-year-old unmarried daughter was pregnant. The father was not identified beyond the first name of Levi.