Nikki Sixx and wife Courtney welcome baby girl

iStock/Katie MartynovaCongratulations are in order for the Sixx family.

Motley Crue bassist Nikki Sixx and his wife Courtney have welcomed a baby girl, Ruby Sixx. Nikki revealed the news in an Instagram post late Tuesday night, announcing that Ruby was born last Saturday, July 27.

"Fatherhood has been the greatest joy in my life...and [Courtney] is a real natural as a mom," Nikki wrote alongside a photo of a flower-covered baby carriage. "I would like to thank our family and friends for all the love and support (and flowers)."

"We are already sleep training her with a metronome and I got her a pink bass," he added.

Ruby is Nikki and Courtney's first child together. Nikki has four other kids from previous relationships.

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