The Oscar winner and her fiancé, art dealer Cooke Maroney, were captured in photos outside the building.
In June, Lawrence opened up about falling in love with Maroney on the podcast "NAKED With Catt Sadler." "I just met Cooke and I wanted to marry him."
News of the couple's engagement began spreading in February when JLaw was spotted with a massive ring on her finger.
According to CNN, the actress reportedly started dating Maroney last summer.