Facebook CEO Mark Zuckerberg back at work after paternity leave

MENLO PARK, Calif. (KGO) -- Facebook CEO and new dad Mark Zuckerberg went back to work Monday after his two-month paternity leave.

During his time at home, he shared photos on Facebook of his daughter Maxima, whom they've fondly nicknamed Max.

On his first day back, he also found some humor. He posted this photo asking, "What should I wear?"

Zuckerberg, despite being worth billions, keeps a relatively monochromatic and iconic wardrobe that consists of grey t-shirts and hoodies.