Alaska Gov. Sarah Palin is now a granny, People magazine reported Monday. Palin's unmarried 18-year-old daughter, Bristol, gave birth Sunday to a 7-pound, 7-ounce boy. The baby was named Tripp Easton Mitchell Johnston, according to the magazine.

Bristol and Levi Johnston, her babydaddy, reportedly are considering a summer wedding.

The pregnancy became publicly known just as the Republican National Convention was beginning last September, when Bristol still was 17. The news caused Palin's critics to question her credentials as a social conservative as opposition started to build against John McCain's choice of Palin for vice president.

After the campaign announced that the couple planned to get married, Johnston — a former high school hockey player who dropped out of Wasilla High School to become an oil field apprentice electrician — attended the convention with Bristol.

The soap opera that is Palin's life took another turn earlier this month when Johnston's mother was arrested on felony drug charges after state troopers served a search warrant on her home. Authorities say she sent text messages to police informants discussing the illegal purchase of illegal pain killers.