Oh, Baby! Dwayne 'The Rock' Johnson Is Going To Be A Dad! Couple 'Couldn't Be More Thrilled'

Dwayne 'The Rock' Johnson is just a stone's throw away from becoming a dad!

RadarOnline.com can exclusively reveal that the 43-year-old fit star is expecting a little bundle of joy with his longtime singer-musician girlfriend, Lauren Hashian.

"Dwayne and Lauren couldn't be more thrilled," a source tells Radar. "They've been rock solid for about nine years now and felt it was time to expand their family."

The ecstatic couple is expecting their baby this January. According to the source, the two "can't wait" to give Johnson's daughter Simone, 14, a little brother or sister!

"Lauren's brother is also expecting a baby, so the entire family is overjoyed!" adds the source.