December 03, 2014 02:30 PM

Meet the littlest Parker.

Sean Parker and his wifeAlexandra, welcomed their second child, son Zephyr Emerson, on Monday, they announced via social media Wednesday.

“He’s here!!! Zephyr Emerson Parker. Our newest family member born the morning of Dec. 1,” Alexandra posted, sharing a few photos. “Happy family.”

The Napster founder, 35, and his wife are already parents to daughter Winter Victoria, 2 next month.

“Winter can’t wait to be a big sister!” the couple told PEOPLE in September after sharing their happy news. “We are overjoyed and excited to welcome the new arrival into our family.”

Mark Seliger

The couple were married in June 2013 in a fairy-tale ceremony at The Ventana Inn in Big Sur, California, in front of 300 friends and family.

Parker made billions from Napster and Facebook and was portrayed by Justin Timberlake in the film The Social Network, while Alexandra is a singer/songwriter.

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— Sarah Michaud with reporting by Jennifer Garcia

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