Rivera, 27, looked fashionable in a tight-fitted black dress and leather jacket. She accessorised with a matching Chanel bag, sunglasses, and kept her tousle dark locks down, reported Us magazine.
Days earlier, the 'Devious Maids' star and husband Ryan Dorsey, 31, stepped out for the first time since their baby news.
Rivera wed the actor past July in Cabo San Lucas, just three months after calling off her engagement to Big Sean. She announced late last month that the couple are expecting their first child together.