Robert Pattinson and Kristen Stewart may have had a baby on camera as Edward and Bella, but it's their co-stars that are bringing vampire babies into the real world! Jackson Rathbone, who plays Cullen vampire Jasper, has welcomed a baby boy into the world with girlfriend Sheila Hafsadi. Meanwhile co-star Cam Gigandet, who played villain vampire James in the first Twilight film, is expecting his second child with fiancée Dominique Geisendorff!

It was an exciting day for Twilight fans when Rathbone's rep confirmed to Us Weekly that he has Hafsadi, a burlesque dancer, welcomed their first child, Monroe Jackson Rathbone VI. The magazine reports that the baby, who was born Thursday at 9:43 A.M. weighed in at 8 pounds, 11 ounces.

Thank you ALL for the love & support! Sheila & I couldn't be happier to have such a beautiful, healthy baby boy, Monroe Jackson Rathbone VI, the actor tweeted today. Feeling so blessed! What an amazing day! Love and respect, Bone Daddy.

Rathbone met his baby momma while on tour with his band, 100 Monkeys. The couple even hope to have more children!

I've been wanting a kid for a long time, Rathbone revealed to E! Online. I'll have more-probably two or three.

It seems as if fellow Twilight star Cam Gigandet feels the same when it comes to kids! Gigandet and Geisendorff already have a three-year-old daughter, Everleigh Rae, and confirmed that they are expecting their second child. The happy family was just spotted out on the beach for the Fourth of July, where Geisendorff can be seen sporting a tiny baby bump!

What Twilight star do you think will be expecting a child next?