As we've explained before, some actresses just seem to become mega stars one minute before vanishing from Hollywood without a trace.
It's not a case of their careers fizzling out, so there must be something to explain their disappearing act.
Shannyn Sossamon was one of the biggest names to hit the scene and then leave just a few years later.
The actress had moved to L.A. to study dance, and was working as a DJ and model before she was discovered by a casting director.
Her breakout role was as Lady Jocelyn, Heath Ledger's love interest in A Knight's Tale, and Sossamon's performance made her a star overnight.
She received award nominations and praise for her performance, and followed it up with a leading role in the comedy 40 Days and 40 Nights starring John Hartnett.
That's two big parts as the leading lady in back-to-back hit films. But by now you're probably struggling to remember what comes next for Sossamon.
In fact, she co-starred with Heath again in the little-seen horror thriller The Order.
After the film wrapped, Sossamon became pregnant. She later admitted the pregnancy took her by surprise, and it led to an acting hiatus that lasted for years.
But Sossamon hasn't dissapeared from Hollywood completely, and you might have seen her in some recent shows and movies that have slipped your mind.