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"Twilight" star Jackson Rathbone is a dad

Jackson Rahtbone arrives at the 2012 MTV Movie Awards held at Gibson Amphitheatre on June 3, 2012, in Universal City, Calif. Getty

(CBS News) Jackson Rathbone and his girlfriend Sheila Hafsadi welcomed a baby boy on Thursday.

Pictures: Celebrity babies
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The couple named their son Monroe Jackson Rathbone VI.

Jackson tweeted, "I couldn't be happier to have such a beautiful, healthy baby boy."

The 27-year-old "Twilight" star met Hafsadi, a dancer, while on tour with his band 100 Monkeys.

"One of the greatest things I could expect to be in life is a father," the actor told Us Weekly in February. "I'm very excited."

Rathbone will appear in "The Twilight Saga: Breaking Dawn - Part 2," which hits theaters Nov. 16.

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