The model and the Pretty Little Liars star were initially spotted back in May leaving Lucky Strike in New York together hand-in-hand. Ashley uploaded photos of the pair to Instagram but neither of them have commented on the relationship as yet.
A number of fans then Tweeted about seeing the pair kissing in the audience at a Saturday Night Live taping in May.
This week Cara and Ashley were spotted treating themselves to a spa day in West Hollywood ahead of Cara's 26th birthday on August 12.
The pair also celebrated her big day together, with Ashley uploading a video from her birthday party to her Instagram Stories as well as a Face Swap of the pair.
Cara was most recently linked with Paris Jackson after the pair were spotted on a double dinner date with Paris's godfather Macaulay Culkin and his girlfriend.