Say, whatever happened to apple-cheeked actress Larisa Oleynik, star of Nickelodeon's 'The Secret World of Alex Mack' and '10 Things I Hate About You'?

Then:

Larisa Oleynik put her name on the map starring in the Nickelodeon tween series 'The Secret World of Alex Mack' as a girl who gets drenched in a mysterious chemical during an accident and winds up with some pretty cool powers.

She also starred as Dawn in the 1995 'Babysitters Club' movie, and in 1999 she played younger sister Bianca in '10 Things I Hate About You' with Julia Stiles, Joseph Gordon-Levitt, and the late Heath Ledger.

But then she sort of disappeared... or did she?

Now: 

AMC

Oleynik continued to act off and on with parts on '3rd Rock from the Sun,' 'Malcolm in the Middle,' and a handful of smaller film roles.

In 2010, she started randomly popping up on 'Mad Men' as Kenneth Cosgrove's wife, appearing in a few episodes, and she also starred in six episode of the new version of 'Hawaii Five-0.' She guest-starred on 'Mike and Molly' with Melissa McCarthy, and she had a part in 'Atlas Shrugged: Part II,' based on the notorious Ayn Rand novel.

You also might have seen her as Maggie in a few episodes of 'Pretty Little Liars,' and she's currently got a few film projects in production.