<Li> Katherine Cortes (Alex Meneses): a Miami socialite who Rafael has a fling with during his plan to take back the Marbella . </Li> <Li> Baby Michaelina De La Vega Factor (uncredited baby actors): Rogelio and Darci's newborn daughter, Xiomara's stepdaughter, and Jane's half - sister . Rogelio takes a break from acting to be a stay - at - home dad while Darci continues working, but soon discovers it to not be as fun as he expected, instead becoming neglectful of his duties . </Li> <Li> Jane "JR" Ramos (Rosario Dawson): Petra's attorney following Anezka's death . Though seemingly a friend to Petra, it turns out she was being blackmailed to help frame Petra for murder, the life of her schizophrenic mother being at stake . Petra and JR eventually develop romantic feelings for one another and enter into a relationship once Petra's blackmailer - Krishna - is exposed . </Li> <Li> River Fields (Brooke Shields): A famous actress and spokeswoman for postpartum depression, the latter of which she and Rogelio do not see eye - to - eye on . The two later agree to set aside their differences and work together on the American remake of The Passions of Santos . </Li>

Who plays the lawyer in jane the virgin