Photos obtained by the Daily Mail show the couple pushing a stroller walking the city of New York on Monday, April 24.
Harry can be seen wearing a protective face mask and baseball cap while pushing the stroller, which was covered with a blanket to hide their child’s face.
News broke in March that the “Miracle Workers” co-stars were starting a family.
During a walk around New York City with her spouse that same month, Darke, 38, unveiled her baby bump in a black zip-up hoodie.
Since 2012, when they first met on the “Kill Your Darlings” set, she and Radcliffe, 33, have been dating.