Some time ago another org member told me that Vlachs are actually descendants of Thracians. Is this at all true?

Now I know Bulgarians claim the same but that's far from being true since they are mixed in turks and romanians and mostly bulgars. They even speak a slavic language. So they are not thracians. Vlachs on the other hand speak an ancient language only similar to Romanian, so they are definetly the real thing. But are they Thracian?