Levi Johnston, Bristol Palin’s ex, welcomes baby Breeze Beretta with Sunny Oglesby

Levi Johnston — Bristol Palin's ex — and his girlfriend, Sunny Oglesby, 20, have announced the arrival of their baby girl, Breeze Beretta Johnston.

Johnston, 22, also has a 3-year-old son, Tripp, with Palin, 21, daughter of one-time Republican vice-presidential hopeful Sarah Palin.

Oglesby gave birth Wednesday at Matsu Regional Hospital in Wasilla, Alaska, TMZ reported.

Breeze Beretta Johnston weighed in at 6 pounds, 15 ounces.

Johnston and Oglesby had been dating since late 2010, shortly after Johnston's second engagement with Palin fell part.

He admitted that her pregnancy was unplanned.

"There was a time we went to the cabin and forgot the birth control pills, and a month later we found out we were having a baby," the New York Daily News reported him as saying in April.

The name Beretta was inspired by the Italian gunmaker, according to Britain's Daily Mail. and "sits well with Johnston who is an avid hunter of caribou, elk and bears in the wilds of Alaska."

Beretta also makes high-end guns used by the military and police officers.

Palin, a "Dancing with the Stars" contender, wrote a book about being a single teen mom after she and Johnston broke up.

She also appeared on the TV show "The Secret Life of the American Teenager" and posed for Playgirl magazine.

More from GlobalPost: Levi Johnston wants custody of Tripp after watching Bristol Palin's reality show