Showing off her growing baby bump, Williams arrived hand in hand with her fiance, Alexis Ohanian, the co-founder of Reddit. Showing off her growing baby bump, Williams arrived hand in hand with her fiance, Alexis Ohanian, the co-founder of Reddit. The tennis pro had (accidentally) announced she was pregnant with her first child last month when she shared a selfie of her burgeoning belly on Snapchat.