Levi Johnston, girlfriend expecting

Levi Johnston, Bristol Palin's ex-boyfriend and father of their child, Tripp, is going to be a dad again, TMZ reports.

The mother is Johnston's girlfriend Sunny Oglesby, 20, a teacher in Wasilla, Alaska, who is originally from Oregon.

The pregnancy was not expected, according to Johnston, 21. "Things happen and we are both happy with what came of it," Johnston told TMZ. And he added: "Sunny and I are looking forward to raising the [new] baby together and maybe eventually getting married or something." The couple have been dating since December 2010.

Johnston and Bristol Palin, 21, the eldest child of former Alaska Gov. Sarah Palin, became parents to Tripp in late 2008. The couple called off their engagement in March 2009, got engaged again in July 2010, but finally called it off for good three months later.