1. Kim Kardashian
Let's start with Kim K, who plays a marriage counselor in the just-released 'Temptation.' Kim also appeared in 'Disaster Movie' a few years ago co-starring Carmen Electra, but um, yeah, that wasn't good.
2. Jamie Chung
Remember Jamie from 'Real World: San Diego?' Now she's one of few real worlders who's made it to the big screen, appearing in films such as 'Sucker Punch' with Vanessa Hudgens, 'Grown-Ups' with Adam Sandler and 'The Hangover 2' (and 3) with Justin Bartha as her husband. Not too shabby.
3. Kristin Cavallari
While Lauren Conrad went on to be a top-notch author and fashion designer, Kristin, from 'Laguna Beach' and 'The Hills,' preferred acting and appeared in a few small films such as 'Spring Breakdown' and 'Van Wilder: Freshmen Year.' Yeah, we don't remember those movies either.
4. Carrie Underwood
Carrie Underwood won season 4 of 'American Idol,' and the country singer proved she's got acting chops, too, when she was in 'Soul Surfer' with Annasophia Robb in 2011. That movie was a tear-jerker, guys.
5. Jennifer Hudson
And while we're on the topic of 'Idol,' Jennifer Hudson was a contestant back in the day. She didn't even make it to the top 3, but then she went on to win an Oscar for 'Dreamgirls' and play Carrie Bradshaw's assistant in the 'Sex and The City' movie. Take that, Simon.
6. Katharine McPhee
Not even lying, 'House Bunny' is one of our favorite movies, mostly because it introduced us to Emma Stone. But the film also introduced us to Katharine McPhee, who we only knew previously from 'American Idol.'
7. Julianne Hough
Julianne got famous from being one of the professional dancers on the first few seasons of 'Dancing With the Stars,' and then she became a real star after being in films like 'Footloose' and 'Safe Haven.' Also, she dated Ryan Seacrest, which only helped matters.
8. Kenya Moore
It's hard to say if Kenya Moore was an actress or a reality star first, but the 'Real Housewife' of Atlanta has some on-screen cred from her films like 'Waiting to Exhale' and 'I Know Who Killed Me.' The second one starred Lindsay Lohan though, so we'll just pretend that never happened.
9. Kendra Wilkinson
Kendra cameod as a playboy bunny in tons of films because duh, but she's got a semi-bigger part in the upcoming 'Scary Movie 5,' which hits theaters April 12.
10. The Real Housewives of Beverly Hills
And last but not least, we can't forget the RHOBH! Brandi Glanville told us exclusively that she, Kyle Richards and Camille Grammer just filmed a segment in the upcoming spoof film, 'The Hungover Games.' And we're pretty excited to see it, to say the least.