The two children were pronounced dead at the scene.
Broadway actress Ruthie Ann Miles' 4-year-old daughter Abigail Blumenstein was killed when a driver allegedly suffered a medical condition, lost control of her vehicle and sped through a crowded crosswalk.
At the time of the crash, it was reported that Ruthie's unborn baby was unharmed, while the Tony Award-winning actress was recovering after initially being in critical condition.
Miles and her friend Lauren Lew were walking in Park Slope, Brooklyn on March 5 when a driver in a Volvo S60 soared past a red light and drove into them. Blumenstein, who was critically injured in the crash, lost her child on Friday.
"This past Friday Ruthie and Jonathan lost their baby, Sophia Rosemary Wong Blumenstein", said a statement issued to the media by Ben Rabinowitz, an attorney representing the Blumenstein family.
'The pain suffered by Ruthie and Jonathan is almost impossible to fathom, ' they added.
Portia de Rossi had quit acting prior to 'Arrested Development' return
First, de Rossi spoke about her and DeGeneres's upcoming trip to Africa as well as why she chose to quit acting. Portia then told the audience that she chose to quit acting because she's started a new business.
She and husband Jonathan Blumenstein were expecting a baby girl. A second woman was injured and her 1-year-old son, Joshua Lew, also died.
The driver of the auto, Dorothy Burns, has been charged with manslaughter, criminally negligent homicide, reckless endangerment and assault and reckless driving. Bruns was indicted earlier this month.
Bruns has pleaded not guilty, according to public records, and is due back in Brooklyn Supreme Court on June 13.
Hawaii actress Loretta Ables Sayre, a friend of Miles', expressed her condolences on Facebook.
The driver told police she had experienced a seizure at the time of the crash.