The cute trio even made an adorable snack run as they enjoyed their day cruising around Calabasas, California.
A very pregnant Simpson showed off her baby bump in a white satin tunic that she wore over a black dress.
Her hair was styled in braided pigtails, and she accessorized with chandelier earrings and a long silver necklace with tassels.
Ross looked comfy in a black floral hoodie, distressed grey jeans and black sneaks.
And their favorite little guy Bronx, who is Simpson’s son with her ex Pete Wentz, looked quite content as he sipped on a slurpee while rocking a white T-shirt, black shorts and funky printed sneakers.
Simpson and Ross are currently awaiting the birth of their first child together after announcing their pregnancy back in December. They have since revealed that the baby is a little girl and they can’t wait for her to join their family! What do you think Ashlee and Evan will name their baby girl? Tweet us @OKMagazine or let us know in the comments section below.