Bristol has given birth to a son

ANCHORAGE, Alaska (Reuters) – Alaska Gov. Sarah Palin's daughter Bristol has given birth to a son, People magazine reported on Monday.

The 7 lb 4 oz (3.3 kilogram) baby was born on Sunday in Palmer, Alaska, and is named Tripp Easton Mitchell Johnston, reported People, who spoke to Sarah Palin's aunt Colleen Jones.

"The baby is fine and Bristol is doing well. Everyone is excited," Jones told the magazine.

Sarah Palin, the Republican vice presidential nominee in the 2008 election, revealed during the campaign her 18-year-old daughter was pregnant and that Levi Johnston was the father. The couple have said they plan to marry.