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It's a girl for Rachel Bilson!

"The O.C." actress and boyfriend Hayden Christensen have welcomed a baby girl, according to Us Weekly, and their little princess was given a unique name.

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In a nod to the Disney classic "Sleeping Beauty," the couple have named their daughter Briar Rose. In the 1959 movie, Princess Aurora was sheltered from Maleficent's curse. In doing so, the three fairies call the little girl, Briar Rose.

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It's the first child for the longtime couple, who announced that they were expecting in May.

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Us reported that the couple, who met while filming the 2008 film "Jumper," both talked about having a baby for awhile.

In May, Rachel's "Hart of Dixie" costar and fellow mom Jaime King told the magazine, "It's a really celebratory time. I'm really thrilled and happy that she's going to be on this next journey of her life… I know she's going to be the best mother."

Congrats to the happy couple.