As wonderful as Wikipedia is, it seems to be getting as untrustworthy as IMDb. Both are publicly-updated databases, and celebrity updates are only based on news and gossip. Wiki is trying to get around it by sourcing the details at the bottom of the entry, but some of these sources are only dubious gossip web sites anyway, which rather defeats the object of doing it.
The annoying thing with IMDb is that when I try to add genuine details, they don't accept them half the time because they DON'T ask for confirmatory sources. I've just submitted The Best Time Of Our Lives as a new movie entry as we know the writer, producer, director, one cast member and a few other details (they require 5 details minimum), with the role added to Keira's filmography entry too. We'll see how long it takes them to add it, if at all.