Sean Parker, Alexandra Lenas, Zephyr Emerson Parker, Instagram

Instagram

Sean Parker helped bring the world Napster, Facebook and now, a baby boy!

The 35-year-old entrepreneur and wife Alexandra Parker (née Lenas) welcomed son Zephyr Emerson Parker on Monday. The proud mama Instagrammed a picture of herself, Sean and their newest addition Wednesday, captioning the sweet snap simply, "Happy family."

Zephyr is the second child for the couple, whose daughter Winter turns 2 next month. The Parker kids are lucky: Brains run in the family, obviously, but mom and dad are quite the imaginative duo as well.

Sean Parker, Alexandra Lenas, Zephyr Emerson Parker, Instagram

Instagram

When Sean and his singer-songwriter love married in June 2013, they didn't just have a typical fancy wedding. Instead, the couple said "I do" with a $4.5 million Lord of the Rings wedding! The lavish nuptials were attended by 300 family members and friends, including Sting, Emma Watsonand Sean Lennon.

Dad's got even more Hollywood cred than that, though. Justin Timberlake played him in the 2010 film, The Social Network. It was Sean's character, not Facebook co-founder Mark Zuckerberg (played by Andrew Garfield) who delivered the line, "A million dollars isn't cool; you know what's cool? A billion dollars."

According to Forbes estimates, Sean is worth an estimated $2.9 billion in real life.

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