230reed102811_11_X17.jpgIt's a boy for Twilight star Jackson Rathbone!

The actor and his girlfriend Sheila Hafsadi welcomed their first child together on Thursday, a baby boy named Monroe Jackson Rathbone VI, weighing in at 8 pounds, 11 ounces.

The 27-year-old met his burlesque dancer gf during a tour stop with his band 100 Monkeys, and he revealed to US mag after finding out his lady was preg:

    "One of the greatest things I could expect to be in life is a father. I'm very excited!"

"I have one of the greatest dads in the world," he added. "He's just been giving me amazing advice ... Be prepared for lots of poop!"