I'm kind of unintentionally rude, at times, though.
It depends, like if you actually look like the actress that plays Robyn than thatss fine, but if your only similar features are your skin colour and hair colour than yeah it's kind of racist, even if its meant as a complement.
We didn't see the couple, though, so we have no idea how much they did or did not look like actors. I saw this one guy in the parking lot a couple years back that looked like a younger Daniel Dae Kim (Jin from Lost). I was driving, so I didn't tell him he looked like DDK, and I don't know if I would have, but that doesn't mean I think all men of Asian decent look like DDK, just that this one guy did.