“Erin and Harry met through Kimberly Stewart over a year ago and stayed in touch,” a source told Grazia magazine. “Erin's dad David is a top music producer and a good friend of Kimberly's dad Rod.”
The source also explained that the couple is just having fun.
The 20-year-old definitely has a thing for older women. Foster is 12 years his senior, while Stewart is 14 years older!
Do you think Styles and Foster make a cute couple? Are you surprised by the age difference? Tell us in the comments below or tweet us @OKMagazine.com!